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A week ago
How do scientists use twin and adoption studies in the study of human behavioral genetics?
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1. Scientists compare behaviors in monozygotic twins separated at birth. if they are more likely to display the same behaviors than unrelated individuals of the same age, the behavior probably has a strong genetic component. 

2. Scientists compare sets of monozygotic and dizygotic twins. if monozygotic twins are more likely to exhibit the same behaviors than dizygotic twins, the behavior probably has a strong genetic component.

3. Scientists compare sets of siblings and twins raised in the same household and those raised by adoptive families. if the adopted individuals are more likely to share behavioral  traits with their biological parents than with their adoptive parents, the behavior probably has a strong genetic components.
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