Understanding Twin Studies in Genetics and Behavior

Hard Unit 2: Biological Bases Genetics And Behavior

In behavioral genetics, researchers often seek to understand how genetic predispositions can moderate behavioral outcomes. Twin studies, for instance, are pivotal in isolating the effects of genetics on characteristics such as intelligence, personality traits, and emotional responses. These studies compare monozygotic twins, who share nearly identical genetic material, with dizygotic twins, who share about 50% of their genetic material, to gauge the heritability of various behaviors.

Which of the following statements best reflects the implications of findings from twin studies related to the nature versus nurture debate?

Monozygotic twins have identical environments that contribute equally to their behavioral similarities.

Dizygotic twins invariably exhibit less behavioral resemblance than monozygotic twins due only to genetic differences.

The presence of behavioral similarities in monozygotic twins supports the idea that genetics play a negligible role in behavior.

Comparative studies of monozygotic and dizygotic twins suggest that both genetics and environment significantly contribute to behavior.

Twin studies demonstrate that environmental factors completely overshadow genetic influence in behavioral outcomes.

Hint

Submitted14.6K

Correct11.4K

% Correct78%