Introduction to Psychology 10th Edition by Rod Plotnik,Haig Kouyoumdjian

Exercise 19

Findings from the sexual orientation of identical twins and the shared genetic material from gay brothers are examples of (a) _____ factors in the development of a homosexual orientation. Young boys who prefer girls' toys and girl playmates and engage in opposite-sex behaviors show a tendency to develop a homosexual orientation, which shows the effects of (b) _____ factors on sexual orientation.