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 ...

The 'silent' X chromosome within female brains may not be so silent after all. A new study has found evidence in both mice and humans that as we age, 'sleeping' X chromosomes can be 'awakened' in ...

The well-established existence of sex differences in immune responses, including immune responses driven by T cells, cuts both ways. Females tend to have a stronger immune response to pathogens, yet ...

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 ...