Y chromosome
From ISOGG Wiki
(Redirected from Y-DNA)
Human Y chromosomes are male-specific sex chromosomes; nearly all humans who possess a Y chromosome will be morphologically male. Y chromosomes are therefore passed from father to son. Although Y chromosomes are situated in the cell nucleus, they only recombine with the X chromosome at the ends of the Y chromosome; the vast majority of the Y chromosome (95%) does not recombine. When mutations (single-nucleotide polymorphisms), and short tandem repeat copying mistakes) arise in the Y chromosome, they are passed down directly from father to son in a direct male line of descent.
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Licence
This article is licensed under the GNU Free Documentation Licence. It uses material from the Wikipedia article "Genetic genealogy".
