And the results reveal little if anything about the biology that might underlie these genetic variants. The team then looked at which genetic variants might be behind the link, using data from more thanparticipants in the UK Discover the gay of project and more than 68, individuals whose data was collected by the company 23andMe.
But Discover the gay of man with the generous sample size hopes to answer that question too. Rahman added he was not surprised that the genetic variants identified only have small individual effects, pointing out that since same-sex behaviour is linked to having to fewer offspring, evolution is likely to hide such variants in effect.
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The most important conclusion is that "they represent very, very, very small effects," Neale says. Whether or not a gay gene, a set of gay genes, or some other biological mechanism is ever found, one thing is clear: The environment a child grows up in has nothing to do Discover the gay of what makes most gay men gay.
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Don't Tell Me! A sample that big should eliminate the statistical weaknesses that plagued Hamer. The people who contribute their genetic and health information to those databases are predominantly of European ancestry and are on the older side.