PSYCH101R Chapter Notes - Chapter Chapter 11: Impulsivity, Epigenetics, Heritability
15 Oct 2017
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Genes:our codes for life: behaviour genetics:the study of the relative power and limits of genetic and environmental. One placenta may provide better nourishments which can contribute to differences: fraternal (dizygotic) twins: develop from separate fertilized eggs. When facing new situations, become physiologically aroused: one form of a gene that regulates the neurotransmitter serotonin predisposes a fearful temperament and, in combination with unsupportive care-giving results in a emotionally reactive child. Heritability: using twin and adoption studies, behaviour geneticists can mathematically estimate the heritability of a trait, heritability: proportion of variation among individuals that we can attribute to genes. If some individuals are genetically disposed to be more aggressive than others, that needn"t explain why some groups are more aggressive than others: putting people in new social context can change their aggressiveness. The new frontier: molecular behaviour genetics: molecular genetics: sub eld of biology that studies the molecular structure and function of genes.
