The male-determining sex chromosome has lost 97 percent of its ancestral genes in the last 300 million years. If that rate ...

Cephalopods may have the oldest sex chromosomes of any animal, according to a new discovery in the octopus genome. That's a big deal given that scientists didn't know until now if these oddball ...

Every human cell has a pair of chromosomes that give your body a blueprint for how to grow and develop starting as a single cell inside a uterus. But in a new study from the Cedars-Sinai cancer center ...

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 ...

Scientists remain divided over whether the human Y chromosome will eventually vanish. But clinicians say the real concern ...

Tokyo, Japan – 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 ...

A genome sequence for the flatworm Schmidtea mediterranea reveals a chromosome that might be primed to become a sex chromosome. The finding offers a remarkable chance to study the evolution of sex ...

The human Y chromosome, responsible for male sex determination, has forfeited 97% of its ancestral genes over the past 300 ...

Forget the battle between the sexes. There’s a tinier battle raging within the sexes — at the genetic level. In some species’ sperm, X and Y chromosomes wrestle for dominance, each trying to improve ...

Sex chromosomes in vertebrates range from highly heteromorphic (as in most birds and mammals) to strictly homomorphic (as in many fishes, amphibians, and nonavian reptiles). Reasons for these ...

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 ...