This article from Blaine Bettinger, Ph.D., J.D., writing in his Blog The Genetic Genealogist, alerts us to the dangers of relying on shared DNA segments of 7 cM and less.
The material is nicely presented with a comprehensive summary at the beginning, preceding a more in-depth technical treatment of the topic.
Check it out at:
https://thegeneticgenealogist.com/2017/12/29/a-small-segment-round-up/
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