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Captain Psychology

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ktangen

March 25, 2023 by ktangen

Toddlers

 

Gaining control: today the toilet, tomorrow the world.

There is no one who has more fun and more pain than a toddler. And, remarkably, the highs and lows are only microseconds apart. They’re up, they’re down, and back up again. What a fascinating age.

Here’s what is included in this lesson:

  • Language development
  • Strange Situation task
  • Attachment
  • Hallmarks
  • Autism

 

Photo

Story

Mind Map

Notes

  • Language Development
    • First Sounds
      • 1st Mont
        • Burps, grunts, sneezes et
        • Exercise vocal cord
        • Create dialogue with caregivers
      • 2 Months
        • Coo: primarily responding to “melody” of speech
        • Laugh out loud
        • Able to roll over
      • 3-4 Months
        • Consonant sounds created
        • Buh buh buh buh
        • Dah dah dah dah
        • Sleep through night
      • By 4 months
        • Infants & adults follow each other’s gaze
        • Adults label what is seen
        • Joint attention speeds up language development
      • 6 Months
        • Babbling
        • “prune” sounds not in language
        • Sit up (supported)
        • Baby food
        • Deaf infants fall behind in producing well-formed syllables
      • 8-9 Months
        • Babbling with an accent
        • Crawl & say “dada”
        • maybe “mama”
        • Small finely cut table food
    • Mastering Language
      • Joint Attention
        • Connecting words & things
        • Referent is entire object
        • Not just action
      • 10-12 months
        • Holophrases
        • Single word sentences
        • Naming Mama
        • Requesting Milk
        • Demanding Up!
      • By 1st year
        • Influence behavior of others
        • Use preverbal gestures
        • Some words
        • Infant games show conversational turn-taking
      • 12 months
        • Stand up & single words
        • Drink from a cup
        • 50% can walk
      • 18-24 months
        • Vocabulary spurt
        • Everything has a name
        • Overextensions (dog for any animal)
        • Underextensions (Kitty for family cat only)
    • Two Words At Once
      • Vocabulary builds
      • Slowly from 12 to18 mos.
      • Quickly from 18 to 24 mos.
      • 24 months
        • 200 words
        • Walking
        • Telegraphic speech (2-3 words)
          • Omit nonessentials
          • Daddy shoe
          • More cookie
    • Over-regularization
      • Over applying rules of grammar
      • Plurals and past tenses
      • I holded the rabbit
    • 1st Grade
      • Use 4000 words
      • Understand 8000 words
      • Able to share
      • Toys, food, activities
    • Remember: Comprehension Precedes Production
    • Girls ahead in early vocabulary
    • Parental Speech
      • Child-directed speech (CDS)
        • Aids language development
        • Children prefer CDS
        • Speak in short sentences
        • Use exaggerated expression
        • Very clear pronunciation
  • Attachment
    • Observe that:
      • Infants seeks to be close
      • Follow you around
      • Cry when you’re gone
      • May not be species specific
    • Psychoanalytic explanation
      • Freud’s psychosexual theory
      • Assumes
        • Personality formed in 1st 2 yrs
        • Only happens in people
        • Mother is primary care giver
    • John Bowlby’s Ethological Theory of Attachment
      • Emotional tie with mother
      • Strong biological roots
      • 4 Phases
        • 1. Pre-attachment (0-6 weeks)
          • Bond with everyone
        • 2. Attachment-in-making (1½-8mo)
          • Prefer mother’s voice
          • Prefer mother’s face
        • 3. Clear-cut attachment (8-24mo)
        • 4. Reciprocal relationship (18-24+)
    • Measuring Security of Attachment
      • Mary Ainsworth
      • Strange Situation Task
        • 1-2 year olds
      • Procedure
        • 1. Parent-infant shown room
        • 2. Left alone
          • Parent sits, infant explores
        • 3. Stranger enters
          • Talks to parent, sits & reads
          • Approaches infant
          • Parent sneaks out
        • 4. First separation episode
          • Stranger tries to interest child in toys
          • Not block searching for Mom
        • 5. Parent enters
          • Greets & comforts infant
      • Second separation episode:
        • Parent-child together
        • Mother leaves
        • Infant is alone
        • Stranger enters & comforts
        • Mother enters & comforts
    • Conclusions
      • Secure attachment
        • 65% of North American infants
        • Use parent as secure base
        • May or may not cry
        • Prefer parent over stranger
        • At reunion, seek contact
      • Avoidant attachment
        • 20% of North American infants
        • Unresponsive to parent
        • Not distressed by separation
        • React to stranger same way
        • Fail to cling
      • Resistant attachment
        • 10-15% of infants
        • Seeks closeness, fail to explore
        • Upon return, angry, resistant, hitting & pushing
        • Not easily comforted
      • Disorganized/Disoriented
        • 5-10% of infants
        • Show great insecurity
        • Confused-contradictory behavior
        • Dazed facial expression
    • Criticisms
      • Categories add up to 110%?
    • Design Problems:
      • Mothers wanted to intro child to toys & room more
      • Strangers disliked baby crying
      • Inconsistent response to child
      • Reliability of rating scales varies
  • Parental Style
    • Two components
      • Parental warmth: affection vs. rejection
      • Parental control: discipline vs. unsupervised
    • 4 Parental Styles
    • 1. Authoritative
      • High in both warmth & control
      • Predictable environment
      • Has most positive effects
      • Children do well in school, self-confident, & independent
    • 2. Authoritarian
      • Low in warmth, high in control
      • Controlling & demanding
      • Threats &punishment
      • Children are aggressive
      • Have conduct problems
    • 3. Permissive
      • High in warmth, low in control
      • No structure or predictability
      • Few limits on behaviors
      • Children are impulsive & immature
    • 4. Indifferent
      • Low in both warmth & control
      • Few limits & little attention
      • Children unsocial, disobedient & demanding
  • Multiple Attachments
    • Bowlby believed nfants predisposed to one attachment figure
    • Preference declines by age 3
    • Traditional
    • Mother as caregiver
    • Father as playmate
  • Autism
    • Developmental disorder
      • Diagnosed 1-3 years old
      • Symptoms by 18 months
      • Seek help about 24 months
      • Social & communication skills
    • Symptoms
      • Boys more than girls
      • Difficulty with pretend play
      • Poor social interactions
      • Poor verbal & nonverbal skills
      • Lack of empathy
      • Overly sensitive to $
      • Refuse to wear “itchy” clothes
      • Distress if routines changed
      • Repeated body movements
      • Unusual attachment to objects
      • Vary from moderate to severe
      • Not startle at loud noises
      • Heightened response to sounds
      • Miss language milestones:
      • Babbling by 12 months
      • Wave bye-bye by 12 months
      • Say single words by 16 months
      • 2-word phrases by 24 months (not just echoing)
    • Causes
      • Unknown
      • Genetics
      • Identical twins are much more likely than fraternal twins
      • Relatives more like to have:
        • Language abnormalities
        • Chromosomal abnormalities
      • Diet?
        • Some parents try:
          • Gluten-free diet
          • Casein-free diet (milk-cheese)
      • Mercury poisoning?
      • Inability to properly use vitamins and minerals?
      • Vaccines
        • Not the cause
        • Can take single-dose forms
        • Don’t contain added mercury
      • Mirror Neurons in Autism
        • No empathy
    • Generally includes:
      • Asperger’s (good language skills)
      • Rett syndome (for girls)
      • Childhood disintegrative disorder
      • Learn and then lose skills
      • Atypical (misc.)

Terms

  • Ainsworth, Mary
  • Asperger’s syndrome
  • attachment
  • attachment figure
  • Attachment Q-Sort = sort descriptions of child into categories of very-like to very-unlike
  • attachment-in-making phase
  • authoritarian parenting
  • authoritative parenting
  • autism
  • autonomy versus shame and doubt = Erikson’s 2nd stage of development; virtue is will
  • avoidant attachment
  • babbling
  • basic emotions = hypothetical list of simple emotions that are biologically encoded
  • basic trust versus mistrust = Erikson’s 1st stage of development; virtue is hope
  • Bowlby, John
  • caregiver
  • casein-free diet
  • categorical self = Turner, assigning yourself to one of many levels of abstraction
  • child-directed speech
  • childhood disintegrative disorder
  • chromosomal abnormalities
  • clear-cut attachment phase
  • compliance = immediate obedience, not to be confused with respect
  • compliance category = aware of parent, can follow simple instructions
  • comprehension
  • consonant sounds
  • conversational turn-taking
  • coo
  • delay of gratification = ability to delay action for larger reward
  • demanding
  • developmental disorder
  • diet
  • difficult child = Thomas & Chase; 10%, don’t like change, loud disapproval
  • disorganized/disoriented attachment
  • easy child = Thomas & Chase; 40%, cheerful, adapts easily
  • effortful control = ability to self-regulate temperament
  • emotional self-regulation = ability to adjust emotional response to environment
  • empathy
  • ethological theory of attachment
  • first sounds
  • genetics
  • gluten-free diet
  • goodness-of-fit model = Thomas & Chase; adapt environment to match child
  • holophrases
  • indifferent parenting
  • inhibited, or shy, child = withdraw from novel stimuli, negative response
  • interactional synchrony = caregiver & baby respond to each other’s emotional cues
  • internal working model = expectations of availability of help
  • itchy clothes
  • joint attention
  • language abnormalities
  • language development
  • mercury poisoning
  • milestones
  • mirror neurons
  • multiple attachments
  • naming
  • overextensions
  • over-regularization
  • parental control
  • parental styles
  • parental warmth
  • permissive parenting
  • playmate
  • pre-attachment phase
  • pretend play
  • preverbal gestures
  • production
  • pronunciation
  • prune
  • psychoanalytic
  • reciprocal relationship phase
  • requesting
  • resistant attachment
  • Rett syndrome
  • secure attachment
  • secure base = toddlers use familiar people as refuge from explorations
  • self-conscious emotions = more than basic emotions: shame, pride, guilt, embarrassed
  • self-recognition = see self in mirror or baby in mirror
  • sensitive caregiving = prompt response to infant’s needs
  • separation anxiety = upset when caregiver leaves
  • separation episode
  • single word sentences
  • single words
  • sit up (supported)
  • sleep through night
  • slow-to-warm-up child = Thomas & Chase; 10%, inactive, low-key reactions
  • sociable child (uninhibited child) = approach novel stimuli, positive reaction
  • social interaction
  • social referencing = look at others to see how should react
  • social smile = at 8 weeks, broad grin at parents
  • species specific
  • stand up & single words
  • Strange Situation Task
  • stranger anxiety = at 10 months, afraid of unfamiliar people, warm up to them
  • telegraphic speech
  • temperament = hypothesized biological reactivity, appears early, activity level
  • toddlers
  • two-word phrases
  • underextensions
  • uninhibited child (sociable child) = approach novel stimuli, positive reaction
  • unusual attachment
  • vaccines
  • vocabulary
  • vocabulary spurt
  • wave bye-bye

Quiz

  • 1. Who is the “father” of attachment theory?
    • a.           John Bowlby
    • b.           Carl Rogers
    • c.           Albert Ellis
    • d.           Aristotle
  • 2. What are single word sentences:
    • a.           response-demand speech
    • b.           semi-globalizations
    • c.           empathic speech
    • d.           holophrases
  • 3. You should consider autism if a child is not babbling by:
    • a.           3 months
    • b.           6 months
    • c.           9 months
    • d.           1 year
  • 4. When parents and child are looking at the same object it’s:
    • a.           reciprocal attachment
    • b.           insecure attachment
    • c.           heart warming
    • d.           joint attention
  • 5. “I holded the rabbit” is an:
    • a.           emphatic speech
    • b.           underextension
    • c.           overregulation
    • d.           overextension

Answers

  • 1. Who is the “father” of attachment theory?
    • a.           John Bowlby
    • b.           Carl Rogers
    • c.           Albert Ellis
    • d.           Aristotle
  • 2. What are single word sentences:
    • a.           response-demand speech
    • b.           semi-globalizations
    • c.           empathic speech
    • d.           holophrases
  • 3. You should consider autism if a child is not babbling by:
    • a.           3 months
    • b.           6 months
    • c.           9 months
    • d.           1 year
  • 4. When parents and child are looking at the same object it’s:
    • a.           reciprocal attachment
    • b.           insecure attachment
    • c.           heart warming
    • d.           joint attention
  • 5. “I holded the rabbit” is an:
    • a.           emphatic speech
    • b.           underextension
    • c.           overregulation
    • d.           overextension

Summary

Bonus

Photo credit

 

Photo by Kelli McClintock on Unsplash

Filed Under: Lifespan

March 25, 2023 by ktangen

Infants

Photo

[Read more…] about Infants

Filed Under: Lifespan

March 25, 2023 by ktangen

Birth

Photo

[Read more…] about Birth

Filed Under: Lifespan

March 25, 2023 by ktangen

Prenatal

Photo

Story

The human nest.

Prenatal development is both complicated and fast paced. In only 40 weeks, a single fertilized egg matures into a baby. We explore the question: when does life begin?

Here’s what is included in this lesson:

  • Ovulation
  • Fertilization
  • Implantation
  • Germinal stage
  • Embryonic stage
  • Fetal stage

Mind Map

Notes

  • Female sex cells
    • Eggs & Ovaries
    • Left & right
    • Attached to uterus by ligaments
      • Not attached to fallopian tubes
    • 250k cells in each at birth
      • Limited supply
      • Ovarian stem cells add more
  • Classic Example
    • Hormones stimulate monthly
      • FSH (folicle stimulating)
      • LH (luteinizing hormone)
    • One ovary ovulates
      • Randomly left or right
    • Release one egg
    • Follicle swells with fluid
    • Follicle erupts
    • Mature egg pushed thru wall
      • Fluid & cell
    • Fallopian tube fimbria (fringe)
      • Fill with blood
      • Brushes egg into tube
    • Fallopian tube contractions move egg along toward uterus
    • If unfertilized, egg moves to uterus, expelled
    • If fertilized, egg moves to uterus
      • Subdividing as it goes
      • Implanted
  • In real life
    • Can release more than one egg
      • Fraternal twins
      • Each can have its own Dad
    • Ovulate with no menstrual period
      • Can ovulate but no egg
    • Irregular ovulation
    • Normal cycle varies between folk
      • 21-35 days typical
    • Normal cycle can vary in you
    • Pain when ovulation begins
    • Pain when egg pushed out
    • Pain from fallopian contractions
    • Pain from uterine contractions
  • Ovum (ova is plural)
    • Grain of sand
    • 23 chromosomes
    • 22 match 22 of men
    • 23rd is X chromosome
  • Male sex cells
    • Testicles
    • Outside ovaries
    • Sperm factories
  • Sperm
    • Produced daily
    • Kept alive by nurse cells
    • Takes 2-3 months to mature
    • Stored for release
    • Die daily
    • 23 chromosomes
      • 22 match the 22 of women
      • 23rd determines sex
        • X or Y
        • Girl (XX) or boy (XY)
    • 3 parts
      • Head; covered with enzymes
      • Middle (connector)
      • Tail
  • Process
    • Sperm ejaculate 300 million
    • Enter vagina
    • 20% die immediately
    • Can live 4-5 days
    • 10% make it through cervix; 3 million
    • Must swim upstream
    • Go to correct fallopian tube
  • Fallopian tubes
    • About width of pencil
    • Collect & transport zygote
    • Go from ovary to uterus
    • Long, thin tubes
    • 2 (left & right)
  • Fimbria = fringe
    • collection end of tube
    • finger-like projections
    • actively go and get egg
  • Cilia = tiny hair-like fibers
    • “feed” it into fallopian tube
  • Problems:
    • tubal ectopic pregnancies
    • inflammation (infection)
    • cancer (extremely rare)
    • scar tissue (adhesions)
    • cysts
    • fertilization occurs in fallopian tube
  • Classic Example
    • Good swimmers
    • 1000 reach ovum
    • 1 binds with egg
    • Penetrates egg
    • Swells in size
    • Releases DNA
    • Chromosomes line up
    • Pairs connect
    • Dominant-recessive
    • Unique combinations
    • Takes 24 hours
  • Germinal Stage Week 1 & 2
    • Week 1
    • Fertilization to implantation
    • Zygote = 1 fertilized egg
      • Surrounded by plasma membrane
      • Mother’s body changes
      • Uterine lining is developing
    • Cleavage
      • partitions zygote into 2 cells
      • 30 hours after fertilization
    • Zygote remains the same size
      • Component cells are smaller
    • Morula
      • Solid ball of 32 cells
      • Day 4-5 but still same size
    • Blastula
      • Same size as original cell
      • Hollow ball of 250+ cells
      • Filled with fluid
      • 2 layers
        • Inner layer = blastocyst
          • becomes embryo
        • Outer layer = trophoblast
          • attaches itself to uterine wall = implantation
    • Implantation
      • Blastula arrives at uterus
  • Day 7-8
    • Stays in uterus a couple of days
    • Imbeds itself in uterine wall
  • Day 11-14
    • Blastula secretes hormones
    • hCG (human chorionic gonadotrophin)
    • Maintains corpus luteum
    • Corpus luteum secretes progesterone for 1st trimester
      • human placental lactogen (HPL)
    • Anti-insulin properties
    • Facilitates fetus’ energy supply
    • Mother may notice missed period
    • Conception = fertilization or implantation?
  • Embryo Stage Week 3-8
  • Fetal Stage Week 9-39
    • Week 24 (6 months)
      • 50% viability
      • Lungs produce surfactant
      • Surfactant
        • keeps lungs air sacs from collapsing when we exhale
    • Week 26-27 (3rd trimester)
      • 85% viability
      • 1.5-2 pounds, 10 inches
    • Week 28 (7 months)
      • Brain surface is wrinkled
      • Breathing & body temp controlled by brain
    • Week 32 (8 months
      • Eyes open when alert
      • Closed when sleeping
      • Eye color is blue
        • regardless of permanent color
        • requires exposure to light
    • Week 39-40
      • 98% viability
      • Expected date of delivery
      • 280 days from last menses period (LMP)
      • 8 pounds, 20 inches
    • Week 40-42
      • full term
      • 70+ reflexes
      • has 300 bones
      • adults have 206 (some fuse together)

Terms

  • 300 bones
  • 70+ reflexes
  • age of viability = somewhere about 6 months pregnant, fetus can survive if born
  • alcohol-related neurodevelopmental disorder (ARND) = alcohol-related developmental disabilities
  • amnion = fluid-filled sac that holds developing fetus
  • anoxia = low oxygen; potential cause of brain damage during delivery
  • Apgar Scale = evaluation of newborns on complexion, pulse, reflexes, activity & respiration
  • blastocyst
  • blastula
  • breech position = non-head-first birth (buttocks or feet)
  • cancer
  • cervix
  • cesarean delivery = surgical delivery of babies through abdominal wall, typically in distress
  • chorion = outermost layer of an embryo, developed by follicle cells of ovary
  • chromosomes
  • cilia
  • cleavage
  • corpus luteum
  • DNA
  • egg
  • ejaculatation
  • embryo = first 8 weeks of prenatal development
  • embryo stage
  • enzymes
  • expected date of delivery
  • expel
  • fallopian tube
  • fallopian tube contractions
  • female sex cells
  • fertilization
  • fertilized egg
  • fetal alcohol spectrum disorder (FASD) = continuum of disorders cause by prenatal alcohol exposure
  • fetal alcohol syndrome (FAS) = prenatal exposure to alcohol, leading cause of mental retardation
  • fetal monitors = monitors fetal heart rate & mother’s uterine contractions
  • fetal stage
  • fetus = from week 8-40 of prenatal development
  • fimbria
  • follicle
  • fraternal twins
  • FSH (folicle stimulating)
  • full term
  • germinal stage
  • hCG (human chorionic gonadotrophin)
  • hormones
  • human placental lactogen (HPL)
  • implantation
  • infant mortality = death of infant under 1 year old
  • inflammation
  • irregular ovulation
  • lanugo = soft fine hair on fetus, normally disappears before birth
  • last menses period (LMP)
  • LH (luteinizing hormone)
  • ligaments
  • menstrual period
  • morula
  • natural childbirth (prepared) = 1930’s movement, noninvasive methods to reduce delivery pain
  • Neonatal Behavioral Assessment Scale (NBAS) = test for infant 3 days to 4 weeks, checklist
  • neural tube = develops into spinal cord and brain
  • non-rapid-eye-movement (NREM) sleep = 3 sleep stages that precede REM
  • ova (plural)
  • ovarian stem cells
  • ovaries
  • ovulation
  • ovum
  • partial fetal alcohol syndrome (p-FAS) = prenatal alcohol exposure: CNS damage & growth deficiency
  • placenta = organ that filters mother’s blood supply for developing fetus
  • preterm infants
  • progesterone
  • rapid-eye-movement (REM) sleep = stage of sleep that includes vivid dreams & sleep paralysis
  • reflex = smallest amount of behavior, sensory neuron goes to spinal cord & triggers motor neuron
  • Rh factor incompatibility = can be a problem in delivery with fetus & mother’s blood come in contact
  • scar tissue & cysts
  • small-for-date infants = below 10th percentile in weight
  • sperm
  • sperm head
  • sperm middle
  • sperm tail
  • states of arousal = levels of consciousness, including sleep
  • sudden infant death syndrome (SIDS) = unexpected death of infant under age 1
  • surfactant
  • teratogen = any substance that interferes with embryo development
  • testicles
  • trimesters = 40 weeks of pregnancy divided into 3 sections
  • trophoblast
  • tubal ectopic pregnancy
  • umbilical cord = connects fetus and placenta
  • unfertilized egg
  • uterine contractions
  • uterus
  • vagina
  • vernix = vernix caseosa, white coating on newborn’s skin, waxy texture
  • viability
  • visual acuity = clearness, focus; newborn have limited vision
  • XX
  • XY
  • zygote

Quiz

  • 1. Which weeks are the fetal stage of development:
    • a.           1-4
    • b.           3-11
    • c.           9-40
    • d.           10-49
  • 2. A solid ball of 32 cells is called a:
    • a.           ovumento
    • b.           morula
    • c.           zygote
    • d.           cilia
  • 3. When is a fetus 50% viable?
    • a.           week 18
    • b.           week 24
    • c.           week 28
    • d.           week 32
  • 4. If 300 million sperm enter the vagina, how many reach the ovum?
    • a.           1
    • b.           ~1000
      c.           ~10,000
    • d.           ~100,000
  • 5. Typically, fertilization occurs in the:
    • a.           fallopian tube
    • b.           vagina
    • c.           uterus
    • d.           cervix

Answers

  • 1. Which weeks are the fetal stage of development:
    • a.           1-4
    • b.           3-11
    • c.           9-40
    • d.           10-49
  • 2. A solid ball of 32 cells is called a:
    • a.           ovumento
    • b.           morula
    • c.           zygote
    • d.           cilia
  • 3. When is a fetus 50% viable?
    • a.           week 18
    • b.           week 24
    • c.           week 28
    • d.           week 32
  • 4. If 300 million sperm enter the vagina, how many reach the ovum?
    • a.           1
    • b.           ~1000
      c.           ~10,000
    • d.           ~100,000
  • 5. Typically, fertilization occurs in the:
    • a.           fallopian tube
    • b.           vagina
    • c.           uterus
    • d.           cervix

Summary

Bonus

Photo credit

Saga of Dave

Dave, our fictional character, does not exist…yet. When he does, there are a lot of things we are going to want to know about him. All of the following characteristics will be a part of understanding Dave.

Before we get to Dave, let’s discuss development itself. There are five things you should know.

[Read more…] about Prenatal

Filed Under: Lifespan

March 25, 2023 by ktangen

Genetics

Genetics by Sangharsh Lohakare

The building blocks of heredity.

Genetics is what makes us unique. There is a shuffling of genes in the making of sperm & eggs. This makes each egg and sperm different from all the rest. Offspring from the same mother and father have the same building blocks but each house (so to speak) is different.

Then when the unique sperm meets a unique egg, there is more matching and mismatching. This process is more systematic, as Mendel showed. But all these connections between parental genetic contributions give us great diversity in our genetic makeup.

Here’s what is included in this lesson:

  • Mendel
  • dominant-recessive
  • autosomal genes
  • sex-linked genes
  • polygenic traits

Photo

Story

Mind Map

Notes

  • Genetics
  • Gregor Mendel (1822-1884)
    • 1st experimental study genetics
    • Took long walks, found unusual ornamental plant
    • Planted it next to typical variety
    • Grew progeny side by side
    • Found
      • Offspring show essential traits of parents
      • Not influenced by environment
      • Each transmits only half its hereditary factors to its offspring
      • Different offspring of same parents receive diff set of hereditary factors
      • Traits inherited in certain ratios
      • Genes dominant or recessive
      • Factors are inherited intact
  • Humans
    • 46 chromosomes
    • 23 from each; paired
    • 25,000 genes (all together)
    • Two copies, 1 from each
    • Matching is by chance
      • Shuffling
      • Unique combination
    • Genes affect structures
    • No single gene causes any behavior
  • Dominant = single copy from either parent carries trait
    • Heterozygous = coded differently
  • Recessive
    • Copy from each parent required
    • Can unknowingly carry disease
    • Can be hidden for generations
    • Affected parent (Dad or Mum)
    • All children have equal chance of inheritance
  • Dominant-Recessive
    • Dominant Wins ¾ Times
    • Dominant Dominant
    • Dominant Recessive
    • Recessive Dominant
    • Recessive Recessive
  • Mendel’s peas
    • smooth or wrinkled
    • green or yellow
    • short or tall
  • Incomplete Recessive
    • In some flowers
    • Red and white produce pink
  • In humans
    • Most cases that look incomplete
    • Multiple mutations
      • Tay-Sachs disease
        • 2 different recessive mutations
      • Sickle Cell Anemia
        • Carriers show no symptoms
        • Unless climb mountains (low oxygen)
  • Single Traits
    • 1. Autosomal Traits
      • Not X or Y
      • Autosomal = equal in each sex
        • Single gene on an autosome (non-sex chromosome)
      • Dominant Trait Examples:
        • Huntington’s disease
        • Neurological disease
        • Many copies of gene segment
        • Recessive Trait Examples:
          • Albinism
          • Cystic Fibrosis
      • Affected parent (Dad or Mum)
        • Children have 50% of inheriting one mutated allele
        • Either get yours or spouse’s
        • Makes you a carrier
      • Carrier
        • One mutated allele
        • One normal allele
        • Allele = gene option (green or yellow)
        • Put two carriers together
          • 25% chance will transmit mutated gene
          • 1 will be unaffected
          • 2 will be carriers
          • 1 will be affected
          • Get 2 bad copies
    • 2. Sex-Linked Traits
      • Sex-linked = appear in only one sex
      • X-Chromosome Linked
        • Females
        • Inherit X from mother
        • Inherit X from father’s mother
        • Healthy copy beats unhealthy
        • Problems in women only when both copies flawed
          • Rare
        • Have 1 bad copy = carrier
        • Have 2 bad copies = show trait
      • Y-Chromosome
        • Most genes come in pairs
        • Except males
        • One Y chromosome
        • One X chromosome
        • Get X chrom. from mother
        • Only one copy
        • No backup
      • Y-Linked Traits
        • Only in men
        • Traits passed from father to son
        • Few genes on Y chromosome
        • Coffin-Lowry Syndrome
          • Mutation in ribosomal protein gene
          • Mental retardation
          • Short stature
          • Craniofacial
          • Skeleton
        • Male Pattern Baldness
          • Begins in front, move backward
          • M shape, then U-shaped
          • Current best gues
          • Susceptibility Y-linked; can pass on to son
          • Hair structure X-linked
    • 3. Sex-limited Traits
      • Autosomal traits that are expressed differently in males & females
      • Sex-limited = appear in both
      • Male & female elephant seals
  • Single Gene Disorders
    • 4000+
    • Cystic Fibrosis
    • Hemophilia
    • Sickle cell
    • PKU (Phenylketonuria)
      • Autosomal Recession
      • 100% genetic
      • Nonfunctional hepatic enzyme
      • Can’t process amino acid (phenylalanine)
      • Can lead to
        • mental retardation & seizures
        • death at young age
      • Diet without substances that need enzyme
        • 100% environment
      • Two factors
      • Gene
      • Diet
  • Polygencic Disorders
    • Complex & multifactorial
    • Multiple genes in combination
      • 10 genes involved in eye color
    • Cluster in families
      • No clear pattern
      • Run in families
    • Also lifestyle and environment
    • Examples
      • Multiple Sclerosis
      • Heart disease & hypertension
      • Asthma
      • Mood disorders
      • Cleft palate
      • Obesity
      • Cancer

 

Terms

  • 25,000 genes
  • 46 chromosomes
  • affected parent
  • albinism
  • allele
  • asthma
  • autosomal traits
  • autosome
  • canalization = robustness, strongly canalized behaviors develop in many different environments
  • cancer
  • carrier
  • chromosomes = combination of DNA, RNA and protein; human cells have 46 (23 pairs); holds genes
  • cluster
  • Coffin-Lowry syndrome
  • collectivist societies = cultures that value group achievement; opposite of individualism
  • cystic fibrosis
  • deoxyribonucleic acid (DNA) = molecule of genetic code, double-helix structure
  • dominant
  • dominant–recessive inheritance = Medelian theory, genes don’t mix, win-lose (freckles, no-freckles)
  • environmental influence
  • epigenesis = assumes relationship between genetics and environment is bidirectional
  • essential traits
  • experimental study of genetics
  • extended-family household = children parents, grandparents, aunts, uncles; all in one house
  • fraternal twins (dizygotic) = two fertilized eggs, different gene combination, same environment
  • gametes = reproductive cells (sperm and egg)
  • gene = short piece of genetic code (DNA and RNA)
  • genes
  • genetic counseling = helping patients at risk for inherited disorders to evaluate options
  • genetic–environmental correlation = amount both factors contribute to a trait
  • genetics
  • genomic imprinting = non-Mendelian inheritance, genes are chemically turned on or off
  • genotype = genetic composition
  • hemophilia
  • hepatic enzyme
  • hereditary factors
  • heritability estimate = how much trait is due to genetics
  • heterozygous
  • heterozygous = each parent gives different allele (freckles & no-freckles)
  • homozygous = each parent gives same allele (freckles gene from each)
  • Huntington’s disease
  • hypertension
  • identical twins (monozygotic) = single fertilized cell divides, each becomes a child
  • incomplete dominance = mixing of two traits, each halfway; might not exist in humans
  • incomplete recessive
  • individualistic societies = cultures that value personal achievement; opposite of collectivism
  • inheritance
  • kinship studies = compare family characteristics; including identical twin studies
  • male pattern baldness
  • meiosis = replication of gonad cells, shuffles genes in each chromosome pair, makes 4 gametes with only 23 chromosomes, each is a unique combination of parents” genetic material
  • Mendel, Gregor
  • Mendel’s peas
  • mitosis = cell replication process of making two identical copies
  • mood disorders
  • multifactorial
  • multiple mutations
  • multiple sclerosis
  • mutation
  • niche-picking = tendency to pick activities that match inherited traits
  • obesity
  • offspring
  • phenotype = observation characteristics
  • PKU (Phenylketonuria)
  • polygencic disorders
  • polygenic inheritance = traits based on multiple genes
  • prenatal diagnostic methods = testing for diseases and conditions before birth
  • progeny
  • public policies = governmental programs and laws
  • range of reaction = portion of gene-environment interaction due to genetics
  • recessive
  • sex chromosomes = pair of chromosomes that determine sex of offspring
  • sex-limited traits
  • sex-linked traits
  • shuffling
  • Sickle Cell Anemia
  • single gene disorders
  • single traits
  • socioeconomic status (SES) = composite of work experience, education & family wealth
  • subculture = cluster within a society, group that differentiates itself from general culture
  • Tay-Sachs disease
  • X chromosome
  • X-linked inheritance = genes on female chromosome, inherit from mother-grandmother
  • Y chromosome
  • Y-linked inheritance = genes on male chromosome, only a few genes present
  • zygote

Quiz

  • 1. Who 1st studied genetics experimentally:
    • a.           Mendel
    • b.           Erikson
    • c.           Freud
    • d.           Galen
  •  2. Y-linked traits occur only in:
    • a.           spring
    • b.           boys
    • c.           girls
    • d.           trick question; boys & girls
  •  3. A gene option (green-yellow flowers) is an:
    • a.           occipita
    • b.           ablator
    • c.           ovum
    • d.           allele
  • 4. In humans, most major diseases are:
    • a.           orthogonal
    • b.           polygenic
    • c.           apotosic
    • d.           Y-linked
  • 5. What condition is caused by a single dominant gene:
    • a.           cystic fibrosis
    • b.           heart disease
    • c.           Huntington’s
    • d.           albinism

Answers

  • 1. Who 1st studied genetics experimentally:
    • a.           Mendel
    • b.           Erikson
    • c.           Freud
    • d.           Galen
  •  2. Y-linked traits occur only in:
    • a.           spring
    • b.           boys
    • c.           girls
    • d.           trick question; boys & girls
  •  3. A gene option (green-yellow flowers) is an:
    • a.           occipita
    • b.           ablator
    • c.           ovum
    • d.           allele
  • 4. In humans, most major diseases are:
    • a.           orthogonal
    • b.           polygenic
    • c.           apotosic
    • d.           Y-linked
  • 5. What condition is caused by a single dominant gene:
    • a.           cystic fibrosis
    • b.           heart disease
    • c.           Huntington’s
    • d.           albinism

Summary

Bonus

Photo credit

Story

Dave, our fictional character, does not exist…yet. When he does, there are a lot of things we are going to want to know about him. All of the following characteristics will be a part of understanding Dave.

Before we get to Dave, let’s discuss development itself. There are five things you should know.

[Read more…] about Genetics

Filed Under: BioPsych, Lifespan Tagged With: BioPsych

March 24, 2023 by ktangen

Science of Change

Autumn is an annual reminder of change.Thing do not stay the same. There are cycles. But it turns out that measuring change is difficult. 

[Read more…] about Science of Change

Filed Under: Lifespan

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