The story of a rare Calico Cat, Josie, has gone viral on TikTok after user @xxycalico shared it on the platform with a video montage of the feline. While the adoption story of Josie is heart-warming, ...

Sex chromosomes are chromosomes, or packages of DNA, that are found inside the nucleus of all of your cells. There are two different kinds: X and Y, which determine whether you’re biologically male ...

A Brazilian woman’s routine post-miscarriage tests led to a rare genetic revelation that surprised doctors and adds to our ...

In 2002, evolutionary biologist Jenny Graves revealed a provocative calculation in regard to the human Y chromosome, later mentioning that it "is running out of time." Over the past 300 million years, ...

We often hear the expression that there are two kinds of people in this world. But that doesn’t always apply when it comes to categorizing people by their sex chromosomes. Other WRAL Top Stories "You ...

Researchers have uncovered which genes on the Y chromosome regulate the development of sperm and impact fertility in male mice. This research could help us understand why some men don't produce enough ...

Biological sex is all over the news lately. Between the presidential executive order affecting passport policy, moving transgender inmates between prisons and regulating women's sports, appeals to ...