Why would nature/evolution develope a "gay gene" in humans or animals,this would defeat the whole purpose of continuation of the species? This makes no biological or common sense. Wouldn't a mechanism in the body fight that gene?
by 
meteorlima
ANSWERS: 3
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We aren't the only species known to have a "gay" gene. There has to be some reason, perhaps to stop over population? I know that's silly but it's something.
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I don't think the body would fight it per se, it's just that those people would be less likely to reproduce and the gene would gradually become less common. That's the little theory I know; I don't know of any other reasons there might be for conditions like this to pop up spontaneously even if they weren't inherited. But it's not like I WOULD know. I'm babbling.
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There are several working models right now that are addressing this fact. One of the most prominent, which deals only with male homosexuality (lesbians are apparently still an enigma) can be found here: http://www.livescience.com/health/080617-hereditary-homosexuality.html What the theory suggests is that there exists a hereditary trait which instills a high physical attraction to males in those who have it. In males, this leads to homosexuality. Many homosexuals do have children and the gene can be passed on thus. What is much more significant is the effect that it has on females who posses it. The boosted physical attraction drives the female to produce more children. Because gender is dictated by the male contribution, the gene can be passed on to males and females, and the cycle continues. There is no definitive answer right now, but this working model gives a good example of how a so called "gay gene" could perpetuate itself through generations.
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