Y chromosome


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Y chromosome

[′wī ′krō·mə‚sōm]
(genetics)
The sex chromosome found only in the heterogametic male sex, as in mammals and Drosophila.
References in periodicals archive ?
Ward and colleagues had previously shown that two Y chromosome genes--Sry and Eif2s3y--are crucial for male mouse development.
These genes have probably migrated to the Y chromosome from various autosomes in the last few hundred million years.
Y chromosome polymorphisms and the origins of Native Americans" American Journal of Human Genetics 59 (1996) (Supplement): A 182.
Y DEBATE Other genetics are divided on how to react to the idea that Genghis Khan himself was central to the spread of a particular Y chromosome.
Even if losing the Y chromosome doesn't cause cancer, the event might signal that a man is at risk, said Forsberg.
This paper simply destroys the idea of the disappearing Y chromosome.
The researchers obtained Y chromosomes by extracting them from cell samples scraped from the men's mouths.
The Science paper Underhill co-authored described the Y chromosomes of more than 1,000 men in 25 different Middle Eastern and European geographic regions.
In a study slated to appear in Molecular and Biological Evolution, Hammer and his colleagues trace the origin of the two Native American Y chromosome lineages to a mountainous region of southern Siberia.
28 Nature, two Australian scientists summarized recent research showing that the human Y chromosome gradually accumulates mutations that deactivate its few genes.
The Y chromosome segments in the new analysis exhibit much less variability than DNA regions that have been studied in other chromosomes.