Results: Because they are likely aware of the importance of genetic bonds in dominant social representations of parenthood, the interviewed fathers are very careful that their own relatives make no distinction between them. D'autres chercheurs mettent en garde contre le fait que les résultats sont limités par le fait qu'une personne qui a eu une seule expérience homosexuelle a été considérée comme non hétérosexuelle.
Keywords: gay fathers, genetic paternity, surrogacy, parenthood. One of the genetic variants was near genes associated with male baldness, suggesting a tie to sex hormones such as testosterone, and another was in an area rich in smell genes, No single gay gene have No single gay gene linked to sexual attraction.
Contribution: The article highlights the complexity of paternity representations. Google Scholar.
They must be based on a misunderstanding or an oversimplification of the processes at work, the scientists said. Advocacy group GLAAD said the study confirmed "no conclusive degree to which nature or nurture influenced how a gay or lesbian person behaves.
Another analysis in the paper, which did not focus on DNA but on familial relationships betweenpairs of individuals, suggested that a slightly larger share of the variation in same-sex behavior, No single gay gene researchers acknowledged some limitations to the study.
Ben Neale, an associate professor in the Analytic and Translational Genetics Unit at Massachusetts General Hospital, who worked on the study, said: "Genetics No single gay gene less than half of this story for sexual behaviour, but it's still a very important contributing factor.
Sign me up to receive the daily Nature Briefing email. He and others noted that older participants came of age when homosexual behavior was criminalized in Britain and that for much of their life homosexuality was classified as a psychiatric disorder.
They also saw that the genetic factors influencing the proportion of same-sex to other-sex partners a person had were different from the ones that separated those who had any same-sex experiences from those who had only other-sex experiences. Indeed, Dr.
When considering just those five statistically significant SNPs, that number drops to much less than 1 percent. The researchers mainly focused on answers to one question: whether No single gay gene ever had sex with a same-sex partner, even once. Scientists have long probed the nature of same-sex behavior, No single gay gene some evidence in twin studies that genetics plays a role.
Five specific genetic variants were found to be particularly associated with same-sex behaviour, including one linked to the biological pathway for smell, and others to those for sex hormones.
Other researchers caution that the findings are limited by the fact that a person who had a single same-sex experience was counted as nonheterosexual. Two markers were shared by men and women, two were specific to men, and one was found only in women.
L'une des variantes génétiques était proche des gènes associés à la calvitie masculine, suggérant un lien avec des hormones sexuelles comme la testostérone, et une autre se trouvait dans une zone riche en gènes olfactifs, qui ont été liés à l'attraction sexuelle.
D'autres chercheurs mettent en garde contre le fait que les résultats sont limités par le fait qu'une personne qui a eu une seule expérience homosexuelle a été considérée comme non hétérosexuelle.