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 ...

Why are the human sex chromosomes called “X” and “Y,” while the other 22 chromosomes are identified only by numbers? The answer begins in the late 1800s, when insect gonad cells, whose large ...

With the publication of Ohno's watershed monograph 1, molecular genetic characterization of the mammalian sex chromosomes has radically altered our view of X-chromosome inactivation and the ...

Females have one active X chromosome and one dormant X chromosome in each cell. But a study suggests that genes on the ...

Human biological sex is determined by the sex chromosomes X and Y. In most cases, females possess two X chromosomes, while males have one X and one Y. However, there is some evidence that the Y ...

Human biological sex is determined by the sex chromosomes X and Y. In most cases, females possess two X chromosomes, while ...

Researchers have shed new light on how a type of heart valve disease -- aortic valve stenosis -- progresses differently in males and females.

A chromosome is a single, long molecule of DNA. These highly organized structures store genetic information in living organisms. Small sections of the chromosome, called genes, code for the RNA ...

Researchers found that a gene on the Y chromosome influences how aortic valve stenosis progresses differently in males and ...

All men and only men have a Y chromosome. This biological fact allows us to trace back in time a direct, largely unchanged genetic line of inheritance from father to son. Every person, male or ...

When you buy through links on our articles, Future and its syndication partners may earn a commission. In a new study, scientists probed the ways in which the X chromosome may change with age and ...