PSYC 2000 Chapter : CHAPTER 8 PYSCH
Document Summary
Gene environment interaction: genes can influence traits, which affect responses, and environment can affect gene activity, for example a genetic predisposition can make a child restless and hyperactive, who then evokes angry responses from his parents. Or a stressful environment can trigger genes to manufacture neurotransmitters leading to depression. Monozygotic and dizygotic twins: to study the effects of heredity and environment two sets of twins, identical and fraternal, have come in handy. Prenatal development: germinal period: first 2 weeks after fertilization, zygote(s) move(s) down to the uterus and begins to implant in the lining, embryo - name for the developing organism from 2-8 weeks after fertilization, placenta begins to form. Brain continues developing even after birth: teratogen: any factor that can cause a birth defect, much exposure occurs in the first trimester before many women even know they are pregnant.
