Y DNA is another test but only males can take the test. The results are from son to father to father to father.... way back. The results can be helpful with a Surname Study.
Session Title
Y is for Y-DNA: What is Genetic Distance?
Session Description
"A brief overview of genetic distance as it relates to Y-DNA testing and determining the time to a most recent common ancestor for you and your patrilineal DNA matches."
Present by FamilyTree DNA
Link:
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