Ancestry Segment Count Update

Hurray!  It’s finally arrived!  My dad and I took Ancestry DNA tests 8 years ago in the fall of 2012, and it’s always bugged me that Ancestry said we shared 55 segments of DNA when we know the true biological number is 22 shared autosomes and 1 shared X chromosome, the full length of the chromosome.  So we should have seen 22 all these years (because X isn’t counted).

Well, it still isn’t 22, but it’s a darn sight closer!

Ancestry Segments Update

The shared segment count with Mom is still pretty far off, but at least it’s not 77 any more.  I suspect the count is due to Ancestry’s algorithms and/or the chip that was used for her test which was done in fall 2018.  Mom also tested at FTDNA (a native kit, not a transfer) and that FTDNA test was the one uploaded to MyHeritage; they’re largely in agreement as one would expect.

The 1st cousin relationship looks fairly consistent the board.

I also noticed that the segment count for my Mom’s Ancestry matches mostly remained the same past 2nd cousin, down to matches of 30 cM, while my matches and my Dad’s matches down to 30 cM showed more adjustment in the segment numbers.  Just a fluke? Or something to do with the testing chip used?

Did you see changes?  There are polls being done at the Genetic Genealogy Tips and Techniques Facebook group here.  

 

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