“[This study] highlights both the importance of the genetics as well as the complexity of the genetics, but genetics is not [the] whole story,” said Dr Benjamin Neale, co-author of the study from the Broad Institute in the US.
Writing in the journal Science, an international team of researchers report how they drew on existing genetic databases to conduct the largest study yet into genetics and same-sex sexual behaviour.
In the first part of the study, they looked at data from about 500,000 individuals collected as part of the UK Biobank project: about 4% of men and nearly 3% of women said they had ever had a same-sex sexual experience. The team stress that they did not focus on identity or orientation, and did not include transgender individuals. [...]
The study provides a number of insights, including that there is overlap between genetic predisposition to same-sex sexual behaviour and traits such as openness to experience, as well as predisposition to mental health problems.
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