For the first time, researchers looked at the complete genome – a person’s entire DNA code – for more than 1,000 gay men and compared it to genetic data from a similar number of heterosexual males.
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They discovered that DNA was different for gay and straight men around the genes SLITRK5 and SLITRK6.
SLITRK6 is an important gene for brain development, and is particularly active in a region of the brain which includes the hypothalamus.
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