Doctors in Brazil discover and confirm that a woman has blood with male chromosomes, a rare case of human chimerism.

A Brazilian woman’s routine post-miscarriage tests led to a rare genetic revelation that surprised doctors and adds to our ...

In humans and many other animals, specific chromosomes determine sex. But how did researchers discover these so-called sex chromosomes? The Sex of Offspring Is Determined by Particular Chromosomes ...

The chromosome associated with male development, which is the last mysterious piece of the human genome, has been fully sequenced by a team of more than 100 researchers around the world including ...

Scientists have confirmed that men are still evolving — or at least the male chromosome is. Y chromosome is what makes men men. A few years ago, scientists began wondering whether it was in trouble.

WASHINGTON, D.C. (June 18, 2003) – In the biological battle between the sexes, the Y chromosome has suffered defeat after defeat. The male-determining chromosome has seen its gene supply shrink from ...

Females and males differ in many ways and yet they share the same genome. The only exception is the male Y chromosome. Using beetles as a study system, new research shows that despite of the Y ...