Which chromosomes do gay people carry

Researchers examined DNA data from more thanparticipants in the U. Biobank and more than 69, people who had their DNA tested by the consumer testing company 23andMe. The findings were replicated with data from three other studies, including one from Sweden.

Men in the new study who said they have had same-sex partners, tended to be more exclusively homosexual than women were, Ganna and colleagues found. In a large study of more thanmen and women in the United States, United Kingdom and Sweden, researchers discovered four genetic variants that occur more often in people who indicated on questionnaires that they had had same-sex sexual partners.

Xq28 Wikipedia

Now the largest independent replication. For humans, male sexuality may be more tightly linked to genes. Another variant in the study is near the ORA51A gene on chromosome 11, which is involved in the ability to smell certain chemicals. Findings from such large studies are more likely to be replicated than the small studies in the past, Bailey says.

But several subsequent studies called his finding into question. The other two influence sex partner choice for both men and women.

Gay genetics BBC Science

In the U. Biobank dataset, for example, younger people reported having same-sex partners more often than older people did, probably because homosexual activity was illegal in the United Kingdom until This is not the only complex human phenomenon for which we see a genetic influence without a great understanding of how that influence works.

One mystery the discovery may help solve is how genetic variants associated with having same-sex partners could persist across generations. “GAY GENES” New research has uncovered DNA differences linked to same-sex sexuality in both men and women.

For instance, a variant on chromosome 15 linked to men having sex with men is also associated with male pattern baldness. Instead, the researchers found genetic variants known as single nucleotide polymorphisms, or SNPs, located on four other chromosomes.

But Ganna and colleagues found no evidence that the X chromosome is involved in partner choice, he said. October 20, at am - More than 2 years ago. By Tina Hesman Saey. In the new study, the more exclusively homosexual partners men had, the fewer children they had; up to 80 percent fewer children than heterosexual men.

But people of both sexes ran the gamut of sexual orientations. Xq28 is a chromosome band and genetic marker situated at the tip of the X chromosome which has been studied since at least [1] The band contains three distinct. Males with a genetic condition called can develop female genitalia and are usually brought up as girls, despite being genetically male – with an X and Y chromosome – and they are attracted to men.

More than 20 years ago, in a study that triggered both scientific and cultural controversy, the molecular biologist offered the first direct evidence of a "gay gene," by identifying a stretch on the X chromosome likely associated with homosexuality. Dean Hamer finally feels vindicated.

Collectively, the DNA differences explained only 8 to 12 percent of the heritability of having same-sex partners. The results are consistent with previous studies suggesting genetics may play a bigger role in influencing male sexuality than female sexuality.

Ingenetic variations in a region on the X chromosome in men were linked to whether they were heterosexual or homosexual, and ina region on chromosome 8 was identified. People who have given their DNA data to those research projects also answered a battery of questions, including ones about whether they had ever had a partner of the same sex and how many sexual partners they have had.

In a preliminary conference report, the researchers suggested that the variants are associated with heterosexuals having more sexual partners than usual, and that heterosexual men with some of the variants are more attractive than those without.

Those traits would give heterosexuals a greater chance to pass the variants on to offspring, keeping those DNA differences in the gene pool. Those genetic tweaks don’t predict who is likely to be gay. Studies of the X chromosome as well as the entire human genome have linked Xq28 to the heredity of homosexuality in human males.

This is the first DNA difference ever linked to female sexual orientation, says Lisa Diamond, a psychologist at the University of Utah in Salt Lake City who studies the nature and development of same-sex sexuality. The human X chromosome with Xq28 (green) located at the tip of the long arm of the chromosome.

Previous sexual orientation genetic studies, including some Bailey was involved in, may also have suffered from bias because they relied on volunteers. People who offer to participate in a study, without being randomly selected, may not reflect the general population, he says.