The incidence of male homosexuality has been found to be slightly higher than usual among

Question

Quizplus · Accepted Answer

Research has found that the incidence of male homosexuality increases with the number of older brothers a man has. This is known as the "older brother effect," and suggests that there may be a biological component to homosexuality, as the effect is not seen in men with older sisters or in women with older siblings of either gender. The other answer choices have not been specifically linked to increased incidence of homosexuality.

The Incidence of Male Homosexuality Has Been Found to Be