저는 동성애가 후천적이라고 생각해왔습니다만 최근에 동성애는 유전적 형질로 결정된다는 글을 봤습니다

제가 과학 쪽으로 깊게 아는게 아니기 때문에 이리저리 찾아봐도 도저히 감이 안 잡히네요

네이버에 검색해보면 아니다 맞다 둘다 있을 뿐더러... 

 http://m.cafe.naver.com/jncwk/34102?searchref=XZ88qmWrj1Fvs48osiCts5wSntTBv%253%39pWb7t%253%39OKzFGRc%253D

이 글을 보게 됐는데 덧글로 의견이 분분하더라구요-0-;;
초파리랑 인간이랑 비교하는 것도 이해가 안되기도 하구요;; 쉽게 설명해주실 수 있을까요?