Chromosomes are tightly coiled structures in each of your cells that contain DNA, the code for all life. DNA is organized in segments on chromosomes called genes. Humans typically have 46 chromosomes ...

Older female mice show poor spatial memory when their paternal X chromosome is inactive and only the maternal copy is active. This phenomenon could be responsible for variation in age-related ...

Sex chromosomes are chromosomes, or packages of DNA, that are found inside the nucleus of all of your cells. There are two different kinds: X and Y, which determine whether you’re biologically male ...

Newly generated, complete genomes for the sex chromosomes of six primate species may inform conservation of these endangered species and shed light on sex-related genetic diseases in both humans and ...

A study in mice suggests how chromosome inactivation may protect girls from a type of autism disorder inherited from their father's X chromosome. Females inherit two copies of the X chromosome, one ...

In the 1980s, scientists knew little about the X and Y chromosomes. What they did understand was that every cell in the body contains 23 pairs of chromosomes. Each of these pairs is similar, except ...

Women are born with two X chromosomes and inherit one from each parent. But in every cell of their body, just one X chromosome is needed – so the other is randomly inactivated. Some cells use only a ...

X-chromosome inactivation varies across different areas of brains. Here, fluorescent imaging data from a mouse reveal where the father’s X chromosome is most active (white) and least active (blue). A ...