Most mammals, including humans, have two sex chromosomes, X and Y. One sex chromosome is usually inherited from each parent, and they pair up as either XX or XY in every cell of the body. People with ...

Founder Jennifer Sey is at the center of a political and cultural shift as her company has hit over $1 million in sales in ...

The ex-president of the fashion brand Levi’s and professional athlete, Jennifer Sey, recently launched a new anti-trans clothing brand known as XX-XY Athletics. The brand is reportedly dedicated to ...

Political outrage surrounding two women competing in boxing at the Paris Olympics stems from "a lot of misinformation," an International Olympics Committee spokesperson said Friday. It all began when ...

For the first time scientists have created two lines of human cells that are identical aside from their sex chromosomes: one has XX chromosomes, and one has XY. This unique set of cells could help ...

When Italian boxer Angela Carini reported that she had “never felt a punch like that” after conceding to Algeria’s Imane Khelif 46 seconds after their Olympic match began, social media exploded with ...