Twin studies concerning sexual orientation have found that if one identical twin is homosexual, the other twin is:
A)homosexual almost 100% of the time
B)homosexual about 20% of the time
C)homosexual about 50% of the time
D)no more likely to be homosexual than any individual (

Question

Twin studies concerning sexual orientation have found that if one identical twin is homosexual, the other twin is:
A)homosexual almost 100% of the time
B)homosexual about 20% of the time
C)homosexual about 50% of the time
D)no more likely to be homosexual than any individual (<10%)

Quizplus · Accepted Answer

Twin studies have shown that if one identical twin is homosexual, the likelihood of the other twin also being homosexual is about 50%. This suggests a significant genetic component to sexual orientation, although it also indicates that other factors, such as environment, play a role.

Twin Studies Concerning Sexual Orientation Have Found That If One