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 ...

Autoimmune diseases, including systemic lupus erythematosus (SLE), are more common in women than men, and scientists are still trying to figure out why. One reason may be related to the number of X ...

Females carry two X chromosomes, after inheriting one from each parent. In order to stop serious problems from arising, cells of the body silence one of those X chromosomes in a process known as X ...

Researchers have long known that women are more likely to develop autoimmune disorders than men, though they’ve struggled to fully understand why. Now a new study in mice suggests a key part of the ...

Nearly every girl and woman on Earth carries two X chromosomes in nearly every one of her cells -- but one of them does (mostly) nothing. That's because it's been silenced, keeping most of its DNA ...

The 23 pairs of human chromosomes. People who inherit two tall X chromosomes (bottom right) are much more susceptible to autoimmune diseases than people with one X and one short Y chromosome. BSIP / ...

Shaped by thousands of years of evolution, the body’s immune system is a vigilant guardian primed against external infectious threats. Too much vigilance, however, and this guardian of potent cells ...