Генетски аспекти на сексуалната ориентација и хомосексуалноста

Abstract

A person’s sexual orientation concerns his or her sexual desires and fantasies towards others in virtue of their sex (gender). However, a person’s sexual orientation is only the part of a person’s sexual interest generally. The last 20 years have seen an explosion in scientific research into the genetic, biological and psychological causes of homosexuality. This article critically surveys contemporary biological and genetic theories of the development of sexual orientations. To say that sexual orientation is biologically based is an ambiguous claim. There are various senses in which it is trivially true that sexual orientation is biological. Various studies suggest that sexual orientation runs in families. Such studies show that a same-sex sibling of a homosexual is more likely to be a homosexual than a same-sex sibling of a heterosexual is to be a homosexual, more simply, for example, the brother of a gay man is more likely to be gay than the brother of a straight man.