The authors of an international research project into the genetics of same-sex behaviour recently reported their findings, and created a minor media stir. The international team of researchers looked at DNA markers and data from surveys of sexual behaviour completed by overUK Biobank participants, as well as 69, users of 23andMe, and found five genetic markers associated with same-sex behaviour. The authors concluded that genetics can explain between 8 percent and 25 percent of the variation in same-sex sexual behaviour.
Rather, according to the study, there are a multitude of genetic variants, each of which have a small effect. Since environmental factors are also at play, according to the study, researchers say there is definitive degree to which nature or nurture influence same-sex relationships. The international team behind the research says they hope the study, which was published in the journal Science, will help normalize same-sex relations.
But biology does in part determine sexual orientation. Those research findings have not been replicated. But it was never going to be that simple: decades of genetic research have shown that almost every human characteristic is a complex interplay of genes and environmental factors. A new study, published in Science this week, confirms that this is the case for human sexuality, too.
Few aspects of human biology are as complex—or politically fraught—as sexual orientation. Now, a new study claims to dispel the notion that a single gene or handful of genes make a person prone to same-sex behavior. The analysis, which examined the genomes of nearly half a million men and women, found that although genetics are certainly involved in who people choose to have sex with, there are no specific genetic predictors.
C HICAGO — The largest study of its kind found new evidence that genes contribute to same-sex sexual behavior, but it echoes research that says there are no specific genes that make people gay. The genome-wide research on DNA from nearly half a million U. The variants were more common in people who reported ever having had a same-sex sexual partner.
But the results, released Aug. The researchers struggled at a news conference to tell reporters what the take home message was. But the result still has meaning, seen in the context of history. Science sometimes led, and sometimes followed.
Homosexuality can refer to both attraction or sexual behavior between people of the same sex, or to a sexual orientation. When describing the latter, it refers to enduring sexual and romantic attraction towards those of the same sex, but not necessarily to sexual behavior. Most scientist today agree that sexual orientation is most likely the result of a complex interaction of environmental, cognitive and biological factors.
Inresearchers discovered a stretch of DNA on the X chromosome they believed to be linked to male homosexuality. A new study published in Science, thought to be the most comprehensive on the topic, adds important information to that back-and-forth. The researchers examined genotyping data and self-reported sexual histories from almostmostly white people of both sexes who were either participating in genetic research projects, like the U. Biobank study, or had purchased genetic testing products from 23andMe and consented to inclusion in the study.