Of Mirroring And Shared Ancestors: Exploiting AncestryDNA To Find Biological Families

  What we aim to accomplish in this post: Provide definitions and an overview of methods for finding biological families of those who don’t know one or both biological parents, using tools at AncestryDNA. Discuss possible future methods that may be helpful in reaching the same goals.   Edit 10 May 2016: The May…

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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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