It was the largest study ever done into human sexuality
s) that correlate with a given trait. The participants were divided on the basis of whether they answered yes or no to the question “Have you ever had sex with someone of the same sex?”—a woolly proxy for sexual orientation, even in the absence of little white lies. The figures theThe researchers found five genetic markers that were significantly associated with a reported homosexual act by one of the participants in the study.
Interestingly, only about 60% of the genetic variants identified in the study were shared by both sexes. Most behaviours show more overlap between the sexes than this, intimating that male and female homosexuality, or at least sexual adventures, may be quite different. David Curtis of University College London notes that what overlap there is “suggests that there could be specific factors affecting same-sex attraction rather than simply being attracted to males versus being attracted to females.
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