A genetic study of nearly half a million individuals has determined there is no single “gay gene”.
The study referred to facts and figures from the UK Biobank and 23andMe and found some genetic variations related to same-sex relations which accounted for at most 25% of same-sex behavior.
“No conclusive degree to which nature or nurture influenced how a gay or lesbian person behaves,” with regards to GLAAD, the advocacy group.
The genomes and their entire genetic make-up were scanned by the researchers of Nearly 409,000 people who signed up to the UK Biobank project, and 68,500 who were registered with the genetics company 23andMe.
Applicants were also questioned if they had same-sex partners or opposite-sex partners.
It was determined by the Harvard and MIT researchers that the genetics possibly can account for between 8-25% of same-sex behavior across the population when the entire genome is measured.
Five precise genetic variants were found to be predominantly related to same-sex behavior, wherein one linked to the biological path for the smell, whereas others for gender hormones. But they accounted for less than 1% of same-sex behavior.
“Genetics is less than half of this story for sexual behavior, but it’s still a very important contributing factor. There is no single gay gene, and a genetic test for if you’re going to have a same-sex relationship is not going to work. It’s effectively impossible to predict an individual’s sexual behavior from their genome”, commented Ben Neale, an associate professor in the Analytic and Translational Genetics Unit at Massachusetts General Hospital.