Are people born gay or straight?
Are people born gay or straight? Much of the current media sources assume the question is a solved scientific problem with all the evidence pointing toward a biological (probably genetic) basis for a homosexual orientation . Contrary to this perception, the question has been poorly studied (or studied poorly), although there is some evidence on both sides of question. In addition, many of the initial studies, which were highly touted by the media as "proof" for a biological basis for homosexuality, have been contradicted by later, more thorough studies. This evidence falls into four basic categories: Brain structure Possible hormonal influences Concordance of homosexuality in twins Concordance of genetic markers in siblings Real genetic studies (GWAS) Why does it matter? Until a few years ago, sexual orientation used to be called sexual preference . Obviously, the two terms denote significant differences in the the manner by which sexuality develops. A preferen...