Chromosome Pile-Ups in Genetic Genealogy: Examples from 23andMe and FTDNA

    What we aim to accomplish: Dissuade people from chasing after small autosomal DNA segments by demonstrating too-common matching in particular regions of chromosomes; emphasizing the pitfalls of half-identical matching; briefly reviewing linkage measurements, emphasizing chromosome region lengths (in centiMorgans) as approximations. Illustrate the need that AncestryDNA had for redesigning their matching system to account…

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Surnames, 23andMe, and AncestryDNA: Making the Most of Match Counts and “Enrichment”

  The questions we hope to answer are these: Can we use the surnames provided (either in lists or pedigrees) by our DNA matches to: Discover the names of ancestors about whom we have no a priori knowledge? Confirm the name of ancestors about which we may have doubts?   This is…

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Reasons Why I’m Not Picking MyHeritage Even Though 23andMe Tried

Over the past year I’ve played with a few items on MyHeritage, always looking for online resources besides ancestry.com by which I can make progress on my difficult branches of my family tree. As a customer of 23andMe, as part of a new promotion they are doing with MyHeritage I…

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