PSYC 2110 Chapter Notes - Chapter 2: Twin, Heritability, Bipolar Disorder

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Chapter 2 terms: pgs: 82-89: behaviour genetics: study of interaction of nature and nurture on human traits and abilities. What is the relative contribution of nature (genes) and nurture (environment) on temperament (emotional reactivity or under-reactivity): heritability estimate: study of extent to which genes contribute to individual differences in traits in a specific population. What % of the variance in measured intelligence- iq- in a given population is genetically influenced: kinship studies: study of traits which have a genetic basis among family members who share genes in common. Monozygotic twins have an identical genetic make-up as compared to dyzygotic twins which share only 50% of inherited genes. Are monozygotic twins more alike than dyzygotic twins in heritable traits such as neuroticism, sociability, or extraversion-introversion: concordance rate: the % of instances in which both members of a twin pair display the same trait.

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