How the Diet of Human Ancestors Affects Our Genes

How the Diet of Human Ancestors Affects Our Genes
AP Photo/Martin Meissner

Did you know that what your ancestors ate affects your genes today?

In humans, anthropologists call this an example of gene-culture coevolution, the hypothesis that human culture and genes interact; changes in culture can drive genetic change (and vice versa). The best example of this is lactose tolerance (the ability to digest dairy), which has independently evolved something like five times in different human groups.

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