They did however find a partial recipe which explained 8–25 percent of same-sex sexual behavior in their study. They found five genetic markers, called SNPs (single nucleotide polymorphisms), related to sexual behavior. According to the team, “one of the markers we identified is also associated with balding, suggesting that sex hormone regulation may be involved in the biology of same-sex sexual behavior. Another is related to our sense of smell. This is interesting, because while odors are important for sexual attraction, we don’t yet understand how this might be related to sexual behavior.”
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