Group of people% people with lactose intolerance Americans of European descent 12% African Americans75% Native Americans100% Mexican Americans 55% English10%

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The inability to digest and absorb lactose (the sugar in milk) that results in gastrointestinal symptoms when milk or food products containing milk are.

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Presentation transcript:

Group of people% people with lactose intolerance Americans of European descent 12% African Americans75% Native Americans100% Mexican Americans 55% English10% Greeks50% Asian Americans95%

Most people in the world…most mammals in the world… stop making this protein after they are weaned. Why?

JasonMomTricia Why does Jason have none of this protein? Why do Mom and Tricia have less lactase? Gel electrophoresis: Lactase samples from 4 people Joel Number of amino acids Origin