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In 2002, evolutionary biologist Jenny Graves shared a controversial calculation. The human Y chromosome, she wrote two years later in a commentary, "is running out of time." The male-determining sex ...

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 ...

Aging men often lose the Y chromosome in a growing number of their cells—and it may be far more dangerous than once believed. This loss has been linked to heart disease, cancer, Alzheimer’s, and ...

The biological necessity of the Y chromosome is undergoing a fundamental reassessment as evidence confirms its disappearance in specific mammalian lineages. While this chromosome has served as the ...

Each human cell contains 23 pairs of chromosomes that carry DNA within their nucleus. The X and Y chromosomes, commonly referred to as the sex chromosomes, are one such pair. They determine the ...

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 ...

When closely related species mate, their offspring sometimes survive but cannot reproduce. This pattern often affects males ...