The improper segregation of chromosomes during cell division leads to abnormalities that disrupt the proper functioning of ...

Greek philosopher Empedocles thought that different temperatures produced different sexes—while others were decidedly ...

"You either have XX or XY chromosomes," Rep. Nancy Mace, R-S.C., wrote Feb. 20 on X. "Those are the options." Most commonly, a person is born with two X chromosomes (female) or an X and a Y (male).

In truth, biological sex, like a lot of scientific categories, is nuanced. It's defined by multiple criteria – including ...

Women possess two X chromosomes, one of which is usually "silent." This latter chromosome, long considered inactive in women, ...

DNA segments that can move from one part of the genome to another—are key to bacterial evolution and the development of ...

“In typical aging, women have a brain that looks younger, with fewer cognitive deficits compared to men,” said Dr. Dena Dubal ...

How did humans evolve brains capable of complex language, civilization, and more? Scientists at UC San Francisco recently ...

Ezra Izer discusses the genetic analysis that has supposedly identified Jack the Ripper ...

Under this proposal, the agencies that issue birth certificates can only change the document based on a few exceptions.

The answer could lie in exceptional DNA. Scientists at UC San Francisco have found that parts of our chromosomes have evolved at breakneck speeds to give us an edge in brain development compared ...