Brothers and twins gay

But experts say the origins of partner preference remain a mystery. For men, new research suggests that clues to sexual orientation may lie not just in the genes, but in the spaces between the DNA, where molecular marks instruct genes when to turn on and off and how strongly to express themselves. That news, presented at the meeting of the American Society of Human Genetics on Thursday, may leave the genetically uninitiated scratching their heads. Through the epigenome, the results suggest, some facet of life experience likely also primes a man for same-sex attraction. But they increasingly suspect it is forged, in part, by the stresses and demands of external influences.
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What it's Like Being Gay and Non-Gay Identical Twins - VICE

Thank you for signing up. Sorry, it looks like an error occurred. The amount we don't know about the difference between twins can be staggering, write Phillip and Douglas Griffiths. Ever since we were young, we were inseparable; but always competitive and trying to be different at whatever we did. From athletics to soccer and school, we were the same but very different.
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What it's Like Being Gay and Non-Gay Identical Twins

Identical twins spend their lives being compared. They share duplicate DNA although it's expressed in different genes , as well as the same upbringing so they're generally similar individuals, notwithstanding the effort they put into being unique. And this is why I find two of my friends so interesting. Angus and Eric Woodward are identical 25 year-old twins from Melbourne. Eric is gay, while Angus is straight, which created an interesting microcosm of individualism as they hit puberty.
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A new study of twins provides the strongest evidence yet that homosexuality has a genetic basis, researchers say, though they say other factors like social conditioning may be important. The study, published in the December issue of The Archives of General Psychiatry, adds to evidence that sexual orientation does not result from a maladjustment or moral defect, one author said. Michael Bailey, an assistant professor of psychology at Northwestern University in Evanston, "which is exactly the kind of pattern you would want to see if something genetic were going on. Bailey was referring to brothers by adoption. The study examined 56 identical twins, 54 fraternal twins and 57 adoptive brothers recruited through advertisements in gay-interest publications.
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