steven3175
steven3175
23-02-2021
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explain y-dna testing
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zoeyy2005
zoeyy2005
23-02-2021
A Y chromosome DNA test (Y-DNA test) is a genealogical DNA test which is used to explore a man's patrilineal or direct father's-line ancestry. The Y chromosome, like the patrilineal surname, passes down virtually unchanged from father to son.
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