Development Notes, 27 Sep

Development Notes, 27 Sep - Twin Studies could it be a...

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Twin Studies could it be a coincidence? many instances where separated twins are nothing alike monozygotic twins have identical genotypes, but can have different phenotypes these differences in phenotype provide strong arguments for environmental influence Adoption Studies track down adopted children and compare their characteristics with those of both their adopted parents and their real parents who do they take after more? provides valuable information for both nature and nurture Modern Nature-Nurture Issue you need them both (shocker. .) we are born with genetic predispositions, but our environments can determine whether they are expressed or not this type of interaction doesn't work for everything Innate Abilities John Locke once described infants as "blank slates" meaning they had no abilities, preferences, or emotional characteristics believed all this had to be learned became obvious that this was not necessarily true infants have the ability to localize stimuli, shield themselves from light, draw attention to themselves, and feed these develop throughout he prenatal, neonatal, and infancy periods Prenatal stage period between conception and birth typically takes 9 months 3 phases germinal fertilized egg (zygote) exponential division of cells group attaches to the lining of the uterus and becomes an embryo embryonic cells begin to differentiate from one another, displaying different traits and characteristics stem cells are cells with no differentiation these cells will eventually group together to form organs of the body cells begin to organize in layers that will eventually become the skin, nervous system, muscle, bones, and internal organs fetal starts around week 8 basic reflexes show up: grasping objects that come into contact with the palm brain forms around week 16 Teratogens materials outside the placenta that can harm the organism during prenatal development viruses/bacteria: herpes, rubella, encephalitis, syphilis, HIV/AIDS
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drugs: alcohol, caffeine, nicotine, thalidomide chemicals/elements: mercury, lead, toluene Fetal Alcohol Syndrome (FAS)
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This note was uploaded on 09/14/2011 for the course PSY 111 taught by Professor Cooper during the Fall '08 term at Miami University.

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Development Notes, 27 Sep - Twin Studies could it be a...

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