Criteria for matching segments (for the 3 big DNA testing companies)

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Criteria for matching segments (as this is a recurring topic)

FTDNA:

7.69 cMs and at least 500 SNPs for the first segment and a total of at least 20 cMs (including the shorter matching segments between 1 cM and 7 cMs) for most populations including Europe, but 5 cMs and at least 500 SNPs for the first segment and a total of at least 20 cMs for specific populations with a history of small founding populations such as Polynesians

23andme:

7 cMs and at least 700 SNPs for first segment; 5 cMs and 700 SNPs for additional segments and for people you are sharing with

AncestryDNA:

5 cMs for the first segment

 

Taken from ISOGG website, see http://www.isogg.org/wiki/Autosomal_DNA_testing_comparison_chart

in The Tree House by Andreas West G2G6 Mach 5 (50.7k points)

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