Pillard and Bailey discovered that when one fraternal twin is homosexual, the chance of the other being homosexual is about
A) 22%.
B) 32%.
C) 42%.
D) 50%.
E) 60%.

Question

Quizplus · Accepted Answer

Pillard and Bailey's research found that when one fraternal twin is homosexual, the likelihood of the other being homosexual is approximately 22%. This study is often cited in discussions of the genetic and environmental factors influencing sexual orientation.

Pillard and Bailey Discovered That When One Fraternal Twin Is