Caption: Loss of the
Y chromosome (illustrated in blue next to an X chromosome) in men's blood cells is associated with a high risk of cancer.
The
Y chromosome contains eight palindromes, regions that are an astonishing 99.
The
Y chromosome data are "consistent with a recent Mongolian expansion.
Moreover, men may have occasionally moved from one region to another after leaving Africa and spread advantageous
Y chromosome mutations, thus fostering the low genetic variability observed in the new study, Harding adds.
exploits the difference in amounts of DNA in X and
Y chromosomes.
More recently, researchers have turned to the
Y chromosome to conduct similar investigations (SN: 5/27/95, p.
However, he predicted that the
Y chromosome in long-eyed males can resist the selfish X and so create an unusual number of sons.
When sperm are produced in men, however, only a part of the
Y chromosome, perhaps 5 percent, can recombine with its partner, the X chromosome.
Women typically have two X chromosomes, one inherited from each parent; men receive an X chromosome from their mother and a
Y chromosome from their father.
Hammer, who presented the
Y chromosome research in October 1996 at the American Society of Human Genetics meeting in San Francisco.
The human
Y chromosome is both a degenerate and a copycat.
The
Y chromosome was once considered a vast DNA wasteland, largely devoid of genes, says David C.
