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  • Big Y haplogroup change

    I recently noticed a change in my father's Big Y haplogroup. Apparently this was a result of being switched to the new Big Y 500?

  • #2
    A change of haplogroup? Well when Big Y results come in, the haplogroup is bound to change. As new testers that share some of those SNPs take the Big Y, the haplogroup will change again. The new Big Y is the Big Y700.

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    • #3
      Do you mean it changed to a deeper branch? (This happens when "a closer match" gets tested)

      Or do you mean it changed to a entirely different part of the haplotree?

      BigY tests, even the old ones, went fairly deep into the Y Chromosome, so even without upgrading to Y700 it is possible and even probable most Y500 tests will see further differentiation of their test results over time as people test who share matching Y-DNA segments. Y700 does test everything Y500 did after all.

      What Y700 does do is test a few million additional base pairs, so there are more chances for common and dissimilar DNA segments alike to be identified, creating more chances for new clusters/branches to be formed that Y500 can't do because it had no data to compare against.

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      • #4
        Haplogroup labels can also change when a new result splits an existing block of equivalent SNPs.

        Coverage statistics of various types of y-tests can been found at https://haplogroup-r.org/stats.html Compare the Y500 numbers to the Y700 to see how much better it is. Note that the Y700 test coverage equals the results that some of us got 5 years ago from other vendors. Having FTDNA finally getting around to updating the BigY test is a good thing for the community. But now we are into long read results....
        Last edited by wkauffman; 19th April 2019, 08:55 PM.

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