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How does FTDNA produce DYS389ii value

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  • How does FTDNA produce DYS389ii value

    My brother's (who is Ia1, closest to AS Modal type) has DYS389i 13, and DYS389ii = 16. Is the DYS 389ii measured independently, or is it calculated from the typical length of the DYS389 of 29.

  • #2
    How does FTDNA produce DYS389ii value

    Unfortunately, I don't have that kind of knowledge, but I do have a 390 value of 25 and a 389-ii value of 29. I have read that this combination is higher in the Balto-Russian group. My matches are consiistently high in R1b1c and with the Maguire related surnames. They are the first two values I check when comparing my matches with others because they are more likely to be 24 and 28 or 24 and 30 than 25 and 29. Whether this makes any kind of sense from a genealogic or DNA standpoint, I don't know. It does seem less common than the 24/30 combination however. My 389-i value is 13.

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    • #3
      Originally posted by santatraugott
      My brother's (who is Ia1, closest to AS Modal type) has DYS389i 13, and DYS389ii = 16. Is the DYS 389ii measured independently, or is it calculated from the typical length of the DYS389 of 29.
      DYS389 is two parts. Apparently the 2nd part can't be measured on its own. So the first part, DYS389i, is measured, then the full DYS389 is measured, and DYS389ii is the difference between them.

      If you add your DYS389i and DYS389ii, you'll get the DYS389-2 value that FTDNA reports.

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