Aging men often lose the Y chromosome in a growing number of their cells—and it may be far more dangerous than once believed.

A 3D graphic showing an artist's interpretation of human X and Y chromosomes. On the left are blue bundles of genetic material making an X shape and on the right blue bundles of genetic material ...

The Atlas blue butterfly, also known as Polyommatus atlantica, has been genetically confirmed as having the highest number of chromosomes out of all multicellular animals in the world. This insect ...

The vast dataset allowed the Johns Hopkins University-led team to demonstrate robust connections between specific variations in a mother's DNA and their risk of miscarriage. The findings shed new ...