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Unraveling Our Genetic History | Garrett Hellenthal | TEDxGoodenoughCollege

Is there such thing as racial purity and are any of us genetically unrelated? Garrett shows us how DNA modelling can pinpoint the times in the past when different populations in the world have intermixed, calling into question our assumptions about homogenous racial identities. In fact, humans all over the world have been exchanging DNA with each other for a very long time… Garrett Hellenthal is statistical geneticist and current research fellow at University College London, focusing on applying mathematical models to DNA data. Garrett received his PhD in Statistics at the University of Washington, after which he continued post-doctoral work on genetic variants and increased risk in diseases at Oxford. Currently, Garrett constructs statistical algorithms to describe the genetic architecture of different human groups, and using DNA to infer human history, which includes elucidating how genetic patterns vary across world-wide human groups and identifying the factors that contribute to this variation. Garrett has created software that can pinpoint times in the past when worldwide and local populations have intermixed due to invasions, migrations and other interactions, highlighting how all human groups appear to carry links to other genetically different groups, often from quite far away, attributable to the many population movements over the centuries. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at http://ted.com/tedx