the years.
A new study published in Science, thought to be the most comprehensive on the topic, adds important information to that back-and-forth. After studying the DNA of nearly half a million people with varying sexual experiences, the researchers found no evidence of a single “gay gene.” There was some genetic association with self-reported same-sex sexual activity, but environmental factors likely play an even larger role, according to the study.
The researchers examined genotyping data and self-reported sexual histories from almost 500,000 (mostly white) people of both sexes who were either participating in genetic research projects, like the U.K. Biobank study, or had [...]