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Notes, analysis and tools for making sense of DNA test results.
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Endogamy
9 out of 10 Ashkenazi DNA matches are noise
Most of an Ashkenazi match list is background. Only about 1 in 60 matches is a strong lead. Here's how to find them.
Ancestry matchesAncestry's 90 cM cliff is hiding your cousins
On Ashkenazi kits, a match just under 90 cM loses more than half its cM on your screen. Some real cousins vanish altogether.
Y-DNAThe haplogroup predictor was 100% sure. It was wrong.
What a Y-111 test can tell you, what only Big Y can, and why a close STR match can still sit on a different branch.