Do you know having same-sex partner might be in your DNA? A study involving 490,000 men and women in the UK, Sweden, and the US was conducted. This study stated that there are 4 genetic variations, which can be found in people who had same-sexual partners. Out of four variants, two variations influenced the sexual partner choice in men. While the other two were affected the partner choice of both men and women.
Geneticist, Andrea Ganna, stated that a gay gene does not exist. The DNA differences described 8% to 12% of heritability for having same-sex partners. She believes that small genetic factors regulate the non-heterosexuality.
The researchers studied the DNA data for more than 400,000 participants in the UK Biobank. On the other hand, 69,000 people got their DNA tested through the company 23andMe. These participants also answered some questions related to having partners of the same sex. The findings from this data were copied with the results of other studies.
According to Bailey, the previous sexual orientation studies were biased. This is because these studies were dependent on the volunteers. He believes that people who are willing to participate in a study may not reflect the population.
Though this was a large study, it does not tell us everything. The study does not shed light on the attraction of the participants of the same sex. There are some people who have sex with the partner of same-sex but won’t classify themselves gay. Moreover, they are not solely attracted to the partner of the same sex. Bailey states that definition of the non-heterosexual a flawed concept. According to the study, a non-heterosexual behavior can be defined as ever having the same-sex partner.
The geneticists including Ganna mentioned that men who had same-sex partners were more homosexual than many women. However, people from both the genders had a range of sexual orientations.
It was found in the Biobank data that many young people have a same-sex partner in comparison to older people. This is because until 1967 homosexual behavior was prohibited.
According to Lisa Diamond, this is the first study that has associated the DNA difference to female sexual orientation. The findings of this study were consistent with previous studies.
Hence, it is concluded that genetic variation has a key role to play in influencing male sexuality than female sexuality.