What stands out the most about this ancient cephalopod sex chromosome is how little the chromosome has changed over time.

Scientists at University of Oregon discover one of the oldest known animal sex chromosomes in California two-spot octopus.

New research shows that female mice expressing only a maternal X chromosome experience faster brain aging and cognitive decline compared to those expressing both maternal and paternal X chromosomes.

Women are born with two X chromosomes and inherit one from each parent. But in every cell of their body, just one X ...

On his first day back in power, President Donald Trump issued an executive order on gender that essentially states that males ...

Females carry two X chromosomes, after inheriting one from each parent. In order to stop serious problems from arising, cells ...

Female mammals typically carry two X chromosomes — one from each parent — and a new study suggests that the maternal X is linked to faster brain aging.

Researchers have identified a sex chromosome in the California two-spot octopus. This chromosome has likely been around for 480 million years, since before octopuses split apart from the nautilus on ...

Researchers from the University of California, San Francisco (UCSF) say they have now found that when the brain cells of female mice express only a maternal X chromosome, the animals’ memory and ...