The study I named was apropos and made my point. Which you don't know because you didn't look at it. Or bother to read the opinions of the true scientific community (not the psychology nuts) who state, one and all, that the studies don't back up the claims that homosexuality is caused by biology or genetics.
For the simple minded:
No, there's no evidence to support homosexuality is not a choice.
http://en.wikipedia.org/wiki/Biology_and_sexual_orientation
From your own article.
Overall, data appear to indicate that genetic factors may play some part in the development of sexual orientation, even if only a modest part. Further work is needed to more precisely quantify any genetic contribution to sexuality and to elucidate its mechanism
By the way...the claim you made wasn't that there is "no evidence to support homosexuality is not a choice" (which is also wrong...but you have a habit of that). It was that homosexuality IS a choice. Which geneticists and scientists definitely don't believe, that much is completely obvious.