British brain research on gays

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The functional implications of these findings in determining adult sexual orientation are as yet far from clear. In addition, to help people catch up with recent work on sexual orientation, LeVay published a book last year called The Sexual Brain. The studies show that identical twins--who share the same genes--are about twice as likely to both be gay or lesbian as are fraternal twins, who share only half their genes. In other words, structurally, at least, the brains of gay men were more like heterosexual women, and gay women more like heterosexual men. Most Popular Now 56, people are reading stories on the site right now.

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My work is just a hint in that direction--a spur, I hope, to future work.

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We aren't brought up by gay families, teachers don't tell us much, there's a huge gap in our knowledge about ourselves. It also made the unassuming LeVay one of the most misunderstood men in America. A much smaller study, which used a different kind of association technique known as a genetic linkage study, had suggested a stretch of DNA on the X chromosome was linked to inherited homosexuality. Richard and I were a couple, a hardworking doctor and a scientist, but not really involved in the gay community. And as a scientist, I knew it was research I was qualified to do. The model student of the institute may be LeVay himself. A difference in hypothalamic structure between homosexual and heterosexual men.

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Another variant on chromosome 11 sits in a region rich with olfactory receptors. Since the area can't be studied in the living, the work had to be done posthumously. If nature has some grand design for the homo in Homo sapiens, he admits, "it remains a mystery for now. But that raises a profound question: Heterosexual people who possess these same four genetic variants tend to have more sexual partners, suggesting associated genes might confer some mating advantage for heterosexuals. And parents, in turn, wrote to say the study helped them understand their kids. How do you count sexual behavior that changes over time in different circumstances?

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