Y chromosome

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  • noun

Words related to Y chromosome

the sex chromosome that is carried by men

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References in periodicals archive ?
To me, it is a paradigm of the decline and fall of the Y chromosome," says reproductive biologist Jennifer Marshall Graves of La Trobe University in Melbourne, Australia.
The UC Berkeley researchers demonstrated that if fewer males were the only cause of the low variability, it would mean that fewer than 1 in 4 males throughout history had passed on their Y chromosome each generation.
SRY is the gene on the mammalian Y chromosome that determines that the organism will be male.
He was determined to prove, through variation in the Y chromosome, that more than three stallions - the Byerley Turk, Darley Arabian and Godolphin Arabian - founded the breed.
Lell and his co-authors have recently refuted this single migration interpretation of Y chromosome data.
Using estimates of the mutation rate of microsatellite DNA, the investigators conclude that the first man to have this particular form of the Y chromosome lived in Mongolia roughly 1,000 years ago.
A separate study of more than 8,500 men with cancer and more than 5,300 healthy men also found that Y chromosome loss increases with age.
Members of his lab have dealt their fatal blow by sequencing the Y chromosome of the rhesus macaque-an Old World monkey whose evolutionary path diverged from that of humans some 25 million years ago-and comparing it with the sequences of the human and chimpanzee Y chromosomes.
A unique aspect of the Y chromosome that lends itself to this sort of research is that the Y does not swap stretches of DNA with other chromosomes.
In contrast, the human Y chromosome dates from 200 million to 320 million years ago.
Underhill studies pairs of mutations on the Y chromosome in current populations.
Hammer of the University of Arizona in Tucson, analyzed a different set of international Y chromosome data in 2001 and largely confirmed the evolutionary tree proposed by Underhill's group.
and his colleagues have identified a means by which the Y chromosome may forestall, or at least delay, the gradual degradation that some biologists argue will ultimately delete it from the human genome.
Men from eastern Africa fell into a genetic group at the root of the Y chromosome tree.
In at least eight species of the mouse genus Akodon, from 10 percent to 60 percent of the females carry a Y chromosome in place of one of the two X chromosomes usually found in the cells of female mammals, report Hopi E.