JakeDay wrote:
I am curious about this so-called gay gene: given that many people live their lives of gayness in a closet, I wonder how the forensic biopsy team are able to say with 100% certainty that any sepcimen is 100% gay or 100% straight. A lot of research suggests that if we consider a person's lifetime history of sexual experience, about 70% of people are bisexual. I think the idea of the "gay gene" is junk science.
The gay gene doesn't sound plausible to me. I personally believe the gene would not have been able to survive the evolution of our species. I'll elaborate as to why.
If a gay gene were to exist, it would have existed long before we, as a species, evolved into homo sapiens. The evidence for this lies in the fact that homosexuality is actually more prevalent in the societies of our closest relatives (apes, monkeys, gorillas etc) than it is in our societies. As we evolved from similar ancestors, we would have both inherited from the gene from the same evolutionary event.
Any negative stigma against homosexuality was created by, and only exists in, our human society. There is yet to be evidence of any other species demonstrating prejudice against homosexuals.
So therefore, if a gay gene existed, how would it have been passed down in a time where there was no such thing as 'being in the closet'. A time where there was no prejudice against homosexuals. The gene would not have been passed down through the generations due to the lack of sex drive for procreations amongst our ancestors.
The gay gene could exist, but only if the gene could be inactive in straight people. Meaning that the gene would have been passed down from our ancestors to us by the straight males with the drive for procreation with other females. If this were the case, it would be extremely difficult for geneticists to determine which gene controls sexuality, because the same gene would be found in both straight people and gay people.
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Personally I think the theories that sexuality is determined in the womb seem very likely. One theory talks about the fetus' exposure to testosterone or something similar.