Notes, analysis and tools for making sense of DNA test results.
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Why a real cousin can vanish from your Ancestry list
Ancestry adjusts small matches. A low number, or a missing match, can hide a documented relationship.
EndogamyHow much of an Ashkenazi match list is noise?
Most are weak leads on their own. The longest segment helps you decide where to start.
Y-DNABig Y vs STR tests: what each one can actually tell you
STRs help you find paternal-line matches. Big Y tests the mutations that define your branch.