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

The X chromosome carries at least 150 genes linked to intelligence. Since the mother has two X chromosomes to pass along while the father only has one, the mother’s contribution to the child’s ...

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

A study finds that female mice using only a maternal X chromosome experience faster brain aging, leading to memory loss.

New research shows that female mice expressing only a maternal X chromosome experience faster brain aging and cognitive ...

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

Human biological sex is determined by the sex chromosomes X and Y. In most cases, females possess two X chromosomes, while males have one X and one Y. However, there is some evidence that the Y ...

Once upon a time, the Y chromosome — responsible for determining male sex — was as robust as its X counterpart. Fast forward a few million years, and it’s now a slimmed-down version of its ...

The X chromosome carries at least 150 genes linked to intelligence. Since the mother has two X chromosomes to pass along while the father only has one, the mother’s contribution to the child’s ...

How do scientists find their way around a chromosome? With chromosome maps called idiograms, researchers can pinpoint the locations of genes and locate abnormal gene forms. Aa Aa Aa Most ...

Researchers at the Crick have uncovered which genes on the Y chromosome regulate the development of sperm and impact fertility in male mice. This research could help us understand why some men don't ...

With the publication of Ohno's watershed monograph 1, molecular genetic characterization of the mammalian sex chromosomes has radically altered our view of X-chromosome inactivation and the ...