Transcriptionally “silent” Barr bodies maintain gene equality in male (XY) and female (XX) cells. How are these unique sex chromosomes formed? "The sex of a somatic cell as highly ...

Females (XX) carry twice as many X-linked genes on their sex chromosomes as males (XY). How do cells control gene expression to manage this potentially lethal dosage problem? A prime example of X ...

This unmatched pair, known as the X and Y sex chromosomes, determines whether we are male (XY) or female (XX). A mother always provides a single X chromosome in her egg. Inherit an X from your ...

During early female development, one of the two X chromosomes is transcriptionally silenced through X inactivation. This ensures that females produce a similar number of X chromosome gene products to ...

The human 'master switch' for sex In mammals, females have two X chromosomes, whereas males have an X and a Y. The Y chromosome bears a gene called SRY, which acts as a "master switch": an XY ...

There are two X chromosomes. Females are referred to as XX. In males, one of the chromosomes is a different in shape. There is an X and also a Y chromosome. Males are referred to as XY.