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How do genes influence our sexuality? The question has long been fraught with controversy. An ambitious new study — the largest ever to analyze the genetics of same-sex sexual behavior — found that genetics does play a role, responsible for perhaps a third of the influence on whether someone has same-sex sex. The study of nearly half a million people, funded by the National Institutes of Health and other agencies, found differences in the genetic details of same-sex behavior in men and women. The research also suggests the genetics of same-sex sexual behavior shares some correlation with genes involved in some mental health issues and personality traits — although the authors said that overlap could simply reflect the stress of enduring societal prejudice. Even before its publication Thursday in the journal Science, the study has generated debate and concern, including within the renowned Broad Institute itself.
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The researchers, writing in Science , suggested genetics may account for as much as one-third of the various factors that determine whether someone is attracted to same-sex partners. The study looked at survey responses and performed analyses known as genome-wide association studies Gwas on data from more than , people who had given DNA samples and lifestyle information to the UK Biobank and to the genetics testing company 23andMeInc, which is based in the US. Asked why they had wanted to conduct such research, the team told reporters on a teleconference that previous studies on this topic had mostly been too small to offer robust conclusions. You can find our Community Guidelines in full here.
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