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Behavior Genetics - Behavior Genetics Explaining Individual...

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Behavior Genetics: Explaining Individual Differences 4. Describe how twin and adoption studies help us differentiate hereditary and environmental influences on human traits. Behavior geneticists explore our differences from one another. Comparisons of identical twins, who are genetic clones, and fraternal twins, who develop from separate eggs, help researchers tease apart the effects of heredity and environment. Research findings show that identical twins are much more similar than fraternal twins in abilities, personality traits, and even interests. Genes matter. The discovery that identical twins separated at birth show remarkable similarities also suggests genetic influence. Adoption enables comparisons with both genetic and environmental relatives. Adoptees' traits bear more similarities to their biological parents than to their care-giving adoptive parents. Nonetheless, the latter do influence their children's attitudes and values. Clearly nature and nurture shape one's developing personality.
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