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 ...

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 ...

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. The X chromosome passed from mom to ...

In particular, it explains that humans have one fewer chromosome pair in their cells than apes, due to a mutation found in chromosome number 2 that caused two chromosomes to fuse into one.

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 ...

Opinions expressed by Forbes Contributors are their own. Telomeres, the protective caps at the ends of our chromosomes, act much like the plastic tips of shoelaces, preventing our DNA from fraying ...

3 “The X chromosome is very curious,” said Tukiainen. “It has a lot of interesting biology with the potential to contribute to female health.” Claudia is an intern at The Scientist with a background ...

Each cell with a nucleus contains chromosomes, which are made from DNA Human body cells each contain 23 pairs of chromosomes, half of which are from each parent. So, human gametes (eggs and sperm ...

To obtain high densities of sgRNA that would give signals significantly above the intracellular fluorescent background ... of target sites (c1-c15) on chromosome 9, each spanning 5 Kb and ...