My buddy and I were talking about homosexuality and evolution. He’s a PhD biochemist and had “heard” (but wasn’t adamant) that there wasn’t a genetic link between homosexuality, and was hypothesizing that possibly it was the result of different environmental factors during development, likely in the womb, but not necessarily due to gene expression. I have read some brief, not overly detailed news articles putting forth that there are indeed genes that are tied to homosexuality, and told him I’d see if I could find them to send him.

Can you provide me links to such articles? Or if you know otherwise, send me those links instead.

It was definitely an interesting conversation. He hypothesized that possibly the link wasn’t genetic, as over millions of years it would have bred itself out of existence, so therefore it must occur for other reasons. I suggested that perhaps, as there are multiple genes that code for skin color or height, there may be multiple genes that produce a “range” of sexual tendencies, so there may have been plenty of reproduction of individuals that were not 100% strictly homosexual.

We also weren’t certain if animals that display homosexuality are generally bisexual, which led us to further wonder if maybe pure homosexuality has become a purely human phenomena stemming from bisexuality first.

I certainly hope I’m not offending anyone with the guesses we made during our conversation. If I have said something rude, please point it out so I can address it. The last thing I want to do is piss someone off about their sexuality.