Scientific research gay gene

However, the INAH3 group appeared to be twice as big in the heterosexual male group as in the gay male group; the difference was highly significant, and remained significant when only the six AIDS patients were included in the heterosexual group. The use of all adult twins in Sweden was designed to address the criticism of volunteer studies, in which a potential bias towards participation by gay twins may influence the results;. They conjure up the specter of the surgical or chemical "rewiring" of gay people, or of abortions of fetal homosexuals who have been hunted down in the womb. The research consisted of 1, homosexual men and 1, heterosexual men. The researchers found a significant difference in INAH3 size between heterosexual men and heterosexual women.

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The life of the gay gene: from hypothetical genetic marker to social reality.

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The Science of Desire: The authors concluded that "our findings, taken in context with previous work, suggest that genetic variation in each of these regions contributes to development of the important psychological trait of male sexual orientation". This was a relevant area of the brain to study, because of evidence that it played a role in the regulation of sexual behaviour in animals , and because INAH2 and INAH3 had previously been reported to differ in size between men and women. Archives of General Psychiatry. The subjects were classified into three groups.

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Archives of Sexual Behavior. One of the women had died of an AIDS-related illness. Scholars have also pointed out that Darwin himself described kin selection in The Origin of Species , so under a Darwinian model of evolution, not only individuals, but family groups bloodlines can compete for selection. Chromosome linkage studies of sexual orientation have indicated the presence of multiple contributing genetic factors throughout the genome. However, the maternal immune hypothesis has been criticized because the prevalence of the type of immune attack proposed is rare compared with the prevalence of homosexuality.

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