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 males have one X and one Y. However, there is some evidence that the Y ...

X and Y chromosomes determine not only the sex ... depending on whether you are male or female. Since females have two X chromosomes, one may be expressed, or manifest in the phenotype, and ...

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

"You either have XX or XY chromosomes," Rep. Nancy Mace, R-S.C., wrote Feb. 20 on X. "Those are the options." Most commonly, a person is born with two X chromosomes (female) or an X and a Y (male).

Consequently, all of the somatic cells in human females contain two X chromosomes, and all of the somatic cells in human males contain one X and one Y chromosome (Figure 3). The same is true of ...

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

Isodicentric Y chromosomes are generated during sperm production through aberrant crossing over between opposite arms of a palindrome. At left is two copies of the normal Y chromosome, each ...

Among the many marvels of life is the cell's ability to divide and thus enable organisms to grow and renew themselves. For ...

Researchers have shed new light on how a type of heart valve disease—aortic valve stenosis—progresses differently in males and females. The research paves the way for treatments that can be tailored ...

The X and Y chromosomes, commonly referred to as the sex chromosomes, are one such pair. They determine the biological sex, reproductive organs, and sexual characteristics that develop in a person.