If you have a WSJ subscription, this article provides a good overview: https://www.wsj.com/articles/research-finds-genetic-links-to-same-sex-behavior-115671016

If you have a WSJ subscription, this article provides a good overview: https://www.wsj.com/articles/research-finds-genetic-links-to-same-sex-behavior-11567101661 https://www.wsj.com/articles/research-finds-genetic-links-to... The study involved people who self-reported whether they had ever had sex with someone of the same sex, not whether they considered themselves gay, lesbian, bisexual or another orientation. “Behavior versus identity are different components and different pieces of how people think about their sexual behavior,” said Benjamin Neale, a geneticist and member of the Broad Institute of MIT and Harvard University who is one of the study’s senior authors. “That is a really critical aspect to sort of appreciating and understanding how we think about these kind of issues.” Taking into account the entire contribution of genetic markers that may play a role, the researchers estimated that genetic variation could account for up to 8% to 25% of same-sex sexual behavior in the population studied. But when the researchers pooled all of the identified markers to create a score for an individual person, the genetic variation explained less than 1%, making it practically impossible to predict a person’s sexual orientation or behavior based on their genome. “It does solidify the fact that genes matter,” said Michael Bailey, a psychology professor at Northwestern University who wasn’t involved in the work. “But it also provides more support for something that we all knew, pretty much—that genes can’t be close to the entire story.”