Y DNA 101

Genetic genealogy is the application of genetics to traditional genealogy. Genetic genealogy involves the use of genealogical DNA testing to determine the level and type of the genetic relationship between individuals.
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darkerhorse
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Y DNA 101

Post by darkerhorse »

I know about males inheriting their Y haplogroup from father to son.

Do males inherit the entire Y DNA or just a portion of the Y DNA known as the haplogroup?

Is Y DNA synonymous with the Y chromosome, meaning the gender chromosome pair, as in xx for females and xy for males? If yes, wouldn't that mean all males in the same paternal line have the identical y in their xy chromosome pair?
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MarcuccioV
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Re: Y DNA 101

Post by MarcuccioV »

darkerhorse wrote: 23 Jun 2021, 03:39 I know about males inheriting their Y haplogroup from father to son.

Do males inherit the entire Y DNA or just a portion of the Y DNA known as the haplogroup?

Is Y DNA synonymous with the Y chromosome, meaning the gender chromosome pair, as in xx for females and xy for males? If yes, wouldn't that mean all males in the same paternal line have the identical y in their xy chromosome pair?
Yes, Y-DNA is the Y (paternal) chromosome. It is passed as you describe, from father to son (only). Therefore it follows the direct male line. Haplogroups can have minor mutations, but these are generally rare & can be thousands of years apart. So the identical haplogroup will remain the same for many, many generations in most cases on the Y-DNA line.

Males get the complete Y-DNA from their fathers, plus X-DNA from their mothers. Females get X-DNA from both, but can only pass on their mtDNA (to both sexes of children). There are many articles about it online...
Mark

If you ignore your foundation, your house will eventually collapse...
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