How are these unique sex chromosomes formed? "The sex of a somatic cell as highly differentiated as a neurone may be detected ...

Cholesterol-lowering statins are among the most widely prescribed drugs in the world. They can have side effects, however, including muscle pain that affects twice as many women as men. When Karen ...

A new study brings together growing evidence that the X and Y chromosomes do much more than just determine biological sex.

Women age differently from men when it comes to health—particularly in conditions like cardiovascular disease and neurodegenerative disorders such as dementia and Parkinson's. Unlike men, who carry ...

Sex chromosomes do more than determine biological sex. Their genes may shape how the brain, immune system, heart, and cancer change with age.

A study led by bioengineers at the University of California San Diego sheds new light on how a type of heart valve disease, called aortic valve stenosis, progresses differently in males and females.

Genes that are switched on or off in the human brain differ between men and women. Moreover, these differences are not uniform. They vary across cortical regions and cell types. Scientists at the ...

Dormant genes on the X chromosome may reawaken in old age, potentially giving the aging female brain a boost that the male brain doesn't receive. This phenomenon may help to explain why, on many ...

In female mammals, one of the two X chromosomes is usually inactive and forms the so-called Barr body. The image shows a cell nucleus with the Barr body marked in green. Unlike men, who carry one X ...