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I once did a paper on the genetic basis of sexual identity. Turns out that many genetic disorders can have a tremendous effect on sexual identity via hormone exposure in the fetus. Particularly, the amount of testosterone the brain is exposed to determines male/female sexual identity, although there are other hormonal problems that can actually alter the sex of the individual with complete disregard to his genetics. That being said, I wouldn't be surprised if there was gene identified that the individual more likely to be gay.
If anyone is interested in this kind of stuff, read up on these disorders:
Klinefelter Syndrome
Turner Syndrome
Trisomy-X
Jacob's Syndrome
Androgen Insensitivity Syndrome
I sum them up quite nicely in my 12-page paper. If anyone wants it, just PM me your e-mail and I'll send it to you.
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C4 to your door, no beef no more...
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