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4 June 2014 — In the 1990s there was a claim that homosexual men share a gay gene. The claim created a furor but now, two decades on, supports this claim and adds another candidate gene.

Still, to say that just three genes makes one a homo or not is a little bit "meh," if I may say so myself — there probably are many genes that affect human sexual orientation. Instead of thinking of gay genes, perhaps we might consider them as male-loving genes, which according to science is common in a female which predisposes her to mate earlier and more often. Now take that idea and flip it on its head to consider a female-loving gene, in both men and women.

Using normal techniques to detect genetic variance associated with homosexuality is difficult for many reasons. One of which is that gay men prefer not to be open about their sexuality. In fact genes only play a part. The question often is "Nature or Nurture?" Perhaps now we can actually say, BOTH.

In 1993, a study was made that suggested that a gene on the X chromosome predisposes a male to homosexuality. Needless to say this study was extremely controversial. In another study associations with genes on three other chromosomes were found, while some others gave contradictory results.

We know that there are gay gene variants in the animal kingdom. Indeed homosexuality is common throughout the animal kingdom. So why is there such discontent about such discoveries? Perhaps gay men and lesbian women are simply on extreme ends of the same spectrum?

Gay men and lesbian women may simply be the two ends of the same distribution.

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