Ancestry/Genealogy

Thor_MN

(11,843 posts)

19. Part of the "Trace" data is due to people migrating to other areas.

Fri May 5, 2017, 05:50 PM

May 2017

Every single ancestor of mine moved to the US from Norway and Sweden. No other countries, yet my results showed "trace" amounts from Ireland, Great Britain, France and Finland/NW Russia. Undoubtedly, in the past, beyond records, there was some migration to/from Norway and Sweden. A Viking (my ancestors that I know of were all farmers) could have left a little something behind on a raid on the British Isles, leaving "Scandinavian" genes in those areas. So now, the local mix of genes includes "Scandinavian" genes and shows up as trace ancestry from that area. Finns/NW Russians undoubtedly repopulated the Scandinavian peninsula after the last Ice Age.
Any area of the world is going to have some drift from other areas, there are no "pure blooded" populations. In my opinion "trace" DNA results are most likely evidence of ancient migrations and not a "surprize" parenting in the recent past. To be sure those happen, but it is far more likely that "trace" DNA results are from ancient population drift.

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