Biological anthropologist Lara Durgavich examines why certain genetic diseases — like Tay Sachs— are carried on through generations, and how they affect our health.This talk was filmed at TEDxTufts. All TEDx events are organized independently by volunteers in the spirit of TED's mission of ideas worth spreading. To learn more about TEDxSHORTS, the TEDx program, or give feedback on this episode, please visit http://go.ted.com/tedxshorts.

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