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Generally, a genealogical DNA test might use either autosomal STRs or autosomal SNPs. However, testing companies do not currently offer autosomal STRs tests that use enough STR markers for genealogy. Some ethnic population matching products use them. The preferred choice for both genealogy and ethnic population matching is microarray chips that use hundreds of thousands of autosomal SNPs.
Answered by anantharaman, 26 Jun '12 12:17 pm
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