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 ...

Men who lose the Y chromosome in blood cells face higher heart disease risks, independent of smoking, obesity, or diabetes.

Men tend to lose the Y chromosome from their cells as they age. But because the Y bears few genes other than for male determination, it was thought this loss would not affect health. But evidence has ...

Researchers from Tokyo Metropolitan University have taken a big step in solving the mystery around why animals evolve sex chromosomes. It had long been proposed that sex chromosomes evolve to reduce ...

The California two-spot octopus (Octopus bimaculoides) is native to the coast of California and Mexico and is identified by their bright blue eyespots. (Roger T. Hanlon/Marine Biological Labratory) ...

By late life, a surprising share of men have blood cells that no longer carry the Y chromosome at all, according to large genetic studies in cohorts such as the UK Biobank. That quiet genetic drift ...

A nearly gapless genome sequence of the echidna, an egg-laying mammal with multiple sex chromosomes, helps researchers to track genomic reorganization events that gave rise to a highly unusual sex ...

The octopus just revealed another one of its secrets: what determines its sex. University of Oregon researchers have identified a sex chromosome in the California two-spot octopus. This chromosome has ...

Here’s a quick reality check: ice cream sales go up in summer, and so do drownings. But no one thinks Ben & Jerry's is a silent killer. It’s correlation, not causation. Yet this same logical ...