Genetics

Republican lawmakers want to ban trans girls from sports, and here’s how they’re going to enforce it.

Anti-LGBTQ conservatives are using the study to argue being gay is a choice that can be cured by ex-gay “therapy.”

Transgender people may, literally, be born that way.

CHICAGO — A large study of gay brothers adds to evidence that genes influence men’s chances of being homosexual, but the results aren’t strong enough to prove it. Some scientists believe several genes might affect sexual orientation. Researchers who led the new study of nearly 800 gay brothers say their results bolster previous evidence pointing to genes on the X chromosome.