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Interactive Video(14 min 52 sec) Embedded quiz modules test students’ understanding as they watch a short film that explores the evolution of the ability to digest lactose as adults (lactose tolerance) and the genetic changes associated with the trait.
Short Film(14 min 52 sec) 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. Also available in Spanish.
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