The observation that there is a tendency for gay men to have a larger number of older brothers than nongay men is known as the _____________ effect.

Question

Quizplus · Accepted Answer

The phenomenon described in this question is known as the fraternal birth order effect, where the likelihood of a man being gay increases with the number of older brothers he has. The other options (LeVay effect, sibling effect, maternal auto-immune effect) are not relevant to this particular phenomenon.

The Observation That There Is a Tendency for Gay Men