Gents and ladies, based on self-help that is popular, hail from various planets, but exactly what actually separates them are radically various chromosomes. With two Xs you are a lady; with one X and a small y, you’re male. No mexican bride other set of chromosomes is almost as diverse. Just just exactly How did the intercourse chromosomes become therefore dissimilar?
Into the October 29, 1999 problem of Science, Bruce Lahn, PhD, assistant teacher of peoples genetics in the University of Chicago and specialist from the development for the intercourse chromosomes, along side their colleague David web web web Page, MD, regarding the Whitehead Institute, report that the X and Y chromosomes–which arose from a set of identical, non sex-determining chromosomes (referred to as autosomes)–diverged from one another during the period of about 300 million years by dealing with four discrete phases in place of in a smooth transition. 继续阅读“The evolution for the intercourse chromosomes: detail by detail”