The question of whether homosexuality is innate or acquired form of sexual desire have long shared the science and society. American scientists have found evidence in favor of the first version.
DNA tests 400 gay and straight demonstrated that genes for at least two different chromosomes depending on sexual orientation men. The region of the X chromosome called Xq28 have some influence on the sexual behavior of men, although scientists do not know exactly which genes from a large number of them being in the field, involved in this process.
Another stretch of DNA on chromosome 8 has also played a role in the formation of sexual orientation, but in this case the mechanism of this influence could not be detected. Scientists previously inclined to think that associated with male homosexuality genes are evolving quietly, as they do carrying their women more fertile. Perhaps this is what is observed with the genes of the region Xq28, because the X chromosome is transmitted only to men from their mothers.
"Our research has shown that there are genes associated with male sexual orientation," - said study author Dr. Michael Bailey. Note that in 1993 the National Cancer Institute scientist Dean Hamer proved hereditary nature of homosexuality. He found that more than 10% of gay brothers, and were themselves homosexual, while, among the heterosexual population, this rate was 3%. Hamer suggested that this is due to the X chromosome, when he learned that his uncle and cousins on the maternal line of gay, too, with more than usual intervals are gay. (READ MORE)
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