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

Each human cell contains 23 pairs of chromosomes that carry DNA within their nucleus. The X and Y chromosomes, commonly referred to as the sex chromosomes, are one such pair.

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 ...

However, the large chunk that has been sequenced contains versions of several of the same genes that are found in the modern human Y chromosome. In modern humans, a Y chromosome gene called SRY ...

The idea that the Y chromosome might eventually disappear has led to speculation about the future of human reproduction. While the loss of the Y chromosome could lead to new sex-determining genes ...

plays a critical role in the disintegration of the Y chromosome, linking LOY to genomic instability and aging processes. LOY in human male cells was first identified over 60 years ago but gained ...

In a study of critical rearrangements of our chromosomes and select variations in our genes, the team looked at genome databases built from Neanderthal fossils, Denisovan fossils, and modern human ...

As ever, the expression and integrity of the sex-chromosome genes provide a clue. One formerly pseudoautosomal gene, human STS, is only partially X-inactivated, whereas its Y homologue has become ...