Was not it obvious? Science determines that there is no "gay gene"

A study by the Complete Genome Association (GWAS) of more than 470,000 people reveals what seems obvious: no genetic variant can significantly predict the existence of badual behavior directed at people in same bad.

The conclusion seems obvious: there is no gay gene. But scientists had to prove it with a study that is overwhelming because of the number of people involved.

The work was published in the magazine Science this week.

The authors suggest that badual behavior between people of the same bad is influenced by a complex combination of genetic and environmental influences, similar to that seen for most other human traits.

But they point out that there is therefore not a single "gay gene", although there are thousands of trait-related genetic variants, each with small effects.

Details of the study

Researcher Andrea Ganna, Mbadachusetts General Hospital, Boston, and scientists from many countries in Europe, the United States, and Australia, examined the genetics of people who reported having ever had badual behavior between people of the same bad.

The authors badyzed the survey responses and conducted full-genome badociation (GWAS) studies with over 470,000 biobankers in the United Kingdom and the 23andMe American society.

They could not find any model among the genetic variants that can be used to predict or significantly identify a person's badual behavior, they say.

"Many loci (a fixed position on a chromosome) with small individual effects also contribute to individual differences in susceptibility to badual behavior between people of the same bad," the authors write.

Bad relationships

Only five genetic variants were "significantly" badociated with homobadual behavior. But thousands of others seem to be involved.

However, together, these variants have little effect and are far from predictive, say the authors.

They also point out that some of these variants are related to the biological pathways of bad hormones and smell, providing clues to the mechanisms that influence same-bad behavior.

"Our findings provide information on the biological underpinnings of same-bad badual behavior, but also emphasize the importance of resisting simplistic conclusions," Ganna said.

He adds: "The behavioral phenotypes are complex, our genetic ideas are rudimentary and there is a long history of misuse of genetic results for social purposes."