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By Andy Coghlan. We have known for decades that sexual orientation is partly heritable in men, thanks to studies of families in which some people are straight and some people are gay. Both findings were confirmed in a study of gay and straight brothers in For the first time, individual genes have been identified that may influence how sexual orientation develops in boys and men, both in the womb and during life. This enabled them to home in on two genes whose variants seem to be linked to sexual orientation. What genes did they find and what do they do?
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Massive Study Finds No Single Genetic Cause of Same-Sex Sexual Behavior

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Massive Study Finds No Single Genetic Cause of Same-Sex Sexual Behavior - Scientific American

Richard Harris. Researchers looked for genetic variants linked to sexual behavior in new genetic research that analyzed DNA from donated blood samples from nearly half a million middle-aged people from Britain who participated in a project called UK Biobank. A huge new study finds a faint hint of genetic variation that may be linked to same-sex behavior. The study broadly reinforces the observation that both biology and a person's environment influence sexuality, but the results reveal very little about that biology. The research is the latest effort in a decades-long quest to understand the inherited component of sexuality. Studies find that siblings are more likely to share their sexual orientation, which suggests a genetic link.
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Search For 'Gay Genes' Comes Up Short In Large New Study

Trump Impeachment Trial. See all. Nsikan Akpan Nsikan Akpan. In its stead, the report finds that human DNA cannot predict who is gay or heterosexual.
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A genetic analysis of almost half a million people has concluded there is no single "gay gene". The study, published in Science , used data from the UK Biobank and 23andMe, and found some genetic variants associated with same-sex relationships. Advocacy group GLAAD said the study confirmed "no conclusive degree to which nature or nurture influenced how a gay or lesbian person behaves.
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