Eli5 How do DNA tests trace not only your relatives?

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I assume for tracing your heritage they look at DNA segments that are common in certain areas but how do they trace back your lineage if they only recently started DNA testing. Did they dig up all the corpses and swab them?

In: Biology

3 Answers

Anonymous 0 Comments

They start with a large sample size of people who already had their heritage known and documented, looked for similarities and differences within those groups, and use that information.

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