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Interesting article on Thomas Jefferson's lineage and Y-haplogroup K2

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  • Interesting article on Thomas Jefferson's lineage and Y-haplogroup K2

    There's an interesting article on yesterday's BBC online about Thomas Jefferson and K2 relatives in Britain. LINK

    They're found a small dispersal of other Jeffersons with the same haplogroup.

  • #2
    So, does this mean Jefferson was a British man? Or was he from North Africa? Or did his people migrate from North Africa to Britain?

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    • #3
      Originally posted by GregKiroKH2
      So, does this mean Jefferson was a British man? Or was he from North Africa? Or did his people migrate from North Africa to Britain?
      They're saying that K2 is as much ingrained into the legitimate Welsh ethnic type as any of the more prominent haplogroups. It is just much much more rare, or alternately, it is at least as old as a Phoenician invasion, but still highly integrated.

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      • #4
        Here may be a better explaination;

        Thomas Jefferson's Y chromosome
        posted by Dienekes on Sunday, February 04, 2007

        I had previously posted that Thomas Jefferson belonged to haplogroup K2, a relatively rare haplogroup. Now, a study has appeared which places his Y chromosome in a global context.

        American Journal of Physical Anthropology (early view)

        Thomas Jefferson's Y chromosome belongs to a rare European lineage

        Turi E. King et al.

        We have characterized the Y chromosome carried by President Thomas Jefferson, the general rarity of which supported the idea that he, or a patrilineal relative, fathered the last son of his slave Sally Hemings. It belongs to haplogroup K2, a lineage representing only 1% of chromosomes worldwide, and most common in East Africa and the Middle East. Phylogenetic network analysis of its Y-STR (short tandem repeat) haplotype shows that it is most closely related to an Egyptian K2 haplotype, but the presence of scattered and diverse European haplotypes within the network is nonetheless consistent with Jefferson's patrilineage belonging to an ancient and rare indigenous European type. This is supported by the observation that two of 85 unrelated British men sharing the surname Jefferson also share the President's Y-STR haplotype within haplogroup K2. Our findings represent a cautionary tale in showing the difficulty of assigning individual ancestry based on a Y-chromosome haplotype, particularly for rare lineages where population data are scarce.

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        • #5
          President Thomas Jefferson has a DXYS 156 value of 7. Since the value is in the lower range, does this suggest that he may have been XXY?

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          • #6
            Originally posted by R2-D2
            President Thomas Jefferson has a DXYS 156 value of 7. Since the value is in the lower range, does this suggest that he may have been XXY?
            It's more likely that they simply input the value from his X copy instead of his Y copy.

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