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    Question General question about haplogroup R

    As far as I understand, haplogroups are formed by common mutations on the Y chromosome. When an ancestor has a mutation and passes it on to his sons. What I am wondering is why today there are only R1a, R1b and R2? The ancestor who had the mutation for haplogroup R would not have had just one...
    • SimonSays97
    • Thread
    • haplogroup mutations r1a r1b
    • Replies: 0
    • Forum: R1b
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