Scientists have uncovered how certain “selfish” genes cheat the normal rules of inheritance by destroying rival sperm cells.

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

In Lake Malawi, hundreds of species of cichlid fish have evolved with astonishing speed, offering scientists a rare opportunity to study how biodiversity arises.

Doctors explain why women face a higher risk of autoimmune diseases like lupus, rheumatoid arthritis and thyroid disorders, ...

Three specific genes on chromosome 21 drive widespread brain changes in Down syndrome, uncovering a new framework for ...

The Y chromosome is among the smallest in the human body and carries the fewest genes. Researchers are paying renewed attention to its role in cancer—specifically, what happens when it vanishes.

Interbreeding Direction Solves Neanderthal X Chromosome Mystery Homo sapiens females unions with Neanderthal males explain X chromosome DNA gap ...

When the two species got together tens of thousands of years ago, the hookups may have often involved a male Neanderthal and a female human, according to a new study. The findings, described February ...

Researchers found that Neanderthals carried excess modern human DNA on their X chromosomes, pointing to predominantly male ...

A new Neanderthal DNA study suggests interbreeding between modern humans and Neanderthals favored pairings of female humans with male Neanderthals. This finding challenges traditional evolutionary ...

The researchers also found that Neanderthals had far more human DNA on their X chromosomes than expected. This confirms the theory that Neanderthal men had more involvement with human women than the ...

Polarizing boxer Imane Khelif provided context on her biological makeup after becoming the central figure in a debate about transgender athletes during the 2024 Olympics. Khelif, an Algerian who won a ...