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Got Lactase? The Co-Evolution of Genes and Culture

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Follow human geneticist Spencer Wells, Director of the Genographic Project of the National Geographic Society, as he tracks down the genetic changes associated with the ability to digest lactose as adults, tracing the origin of the trait to less than 10,000 years ago, a time when some human populations started domesticating animals.

Used with permission from the Howard Hughes Medical Institute, Copyright 2013. All rights reserved. www.BioInteractive.org.

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