What Can DNA Tests Really Tell Us About Our Ancestry?

If you know a little about genetics, you might be baffled by DNA tests that purport to tell us where our ancestors come from. For one thing, you don't get an equal number of genes from each ancestor, outside of our two parents. For another thing, what makes genes from, say, France, different from genes from Spain? This TED-Ed lesson from Prosanta Chakrabarty explains the limitations of genetic tests. -via Geeks Are Sexy

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