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Is being gay biological

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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.
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Is Homosexuality a Choice?

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Homosexuality may be caused by chemical modifications to DNA | Science | AAAS

Homosexuality can refer to both attraction or sexual behavior between people of the same sex, or to a sexual orientation. When describing the latter, it refers to enduring sexual and romantic attraction towards those of the same sex, but not necessarily to sexual behavior. Most scientist today agree that sexual orientation is most likely the result of a complex interaction of environmental, cognitive and biological factors. Although homosexuality does not appear to be adaptive from an evolutionary standpoint, because homosexual sex does not produce children, there is evidence of its existence through human history. Although a number of biological factors have been considered by scientists, such as prenatal hormones, chromosomes, polygenetic effects, brain structure and viral influences, no scientific consensus exists as to how biology influences sexual orientation.
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Why Are People Gay? Gay By Choice or Is Being Gay Genetic?

Two gene variants have been found to be more common in gay men, adding to mounting evidence that sexual orientation is at least partly biologically determined. How does this change what we already knew? 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.
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The question of what causes some people to be gay has been a topic of endless debate among the general public and the mental health community. Generally speaking, the religious community of every persuasion views homosexuality as an abhorrent sin against God and nature. Deeply religious groups among Muslims, Christians, Catholics and Jews reject homosexuality as totally unacceptable in the eyes of God. Therefore, most orthodox religious leaders view it as a life style choice thereby condemning the homosexual to eternal hell. Based on increasing amounts of research the APA decided to drop homosexuality as a diagnostic category.
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