Chris Kaelin, a geneticist at Stanford Medicine, recently solved the riddle of why so many orange cats are male. In a groundbreaking study, Kaelin and his team discovered a unique mutation that ...

The 23 rd chromosome base pair contains what are known as our sex chromosomes. For most females, this pair contains two X chromosomes, while for most males, it contains one X chromosome and one Y ...

An international study has identified more than 50 genes on the X chromosome in which mutations may cause poor sperm production. Nearly half of all men with low or zero sperm count have no medical ...