The probability of a homosexual orientation is higher among monozygotic twins of adult homosexuals than among their fraternal twins.

Question

Quizplus · Accepted Answer

This statement is based on research studies and is true. Studies have found that monozygotic (identical) twins of adult homosexuals have a higher probability of also having a homosexual orientation compared to their fraternal (non-identical) twins. This suggests that genetics play a role in sexual orientation.

The Probability of a Homosexual Orientation Is Higher Among Monozygotic