"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." The 23 rd chromosome base pair contains what are known as our sex chromosomes. For most females, this ...

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. They determine the ...

Earlier this year, the often overlooked issue of differences in sex development came to the fore after two women boxers were allowed to compete in the Olympics after previously failing a gender ...

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 ...

Female mammals typically carry two X chromosomes — one from each parent — and a new study suggests that the maternal X is linked to faster brain aging. When you purchase through links on our site, we ...

A new study reveals why women tend to retain their cognitive abilities longer than men. Researchers hope their findings can help rejuvenate aging brains. Tyron Molteni - stock.adobe.com Men have an X ...

In 2002, evolutionary biologist Jenny Graves shared a controversial calculation. The human Y chromosome, she wrote two years later in a commentary, "is running out of time." The male-determining sex ...

In 2002, evolutionary biologist Jenny Graves revealed a provocative calculation in regard to the human Y chromosome, later mentioning that it "is running out of time." Over the past 300 million years, ...

Researchers from the University of California, San Francisco (UCSF) say they have now found that when the brain cells of female mice express only a maternal X chromosome, the animals’ memory and ...

It’s not just about chromosomes. Or reproductive cells. Or any other binary metric. Many genetic, environmental and developmental variations can produce what are thought of as masculine and feminine ...