People in Europe are adapted to drink milk as adults
Figure 1-25: (a) Frequency in Europe of lactase persistence, the expression of the lactase enzyme in adults. (b) Frequency in Europe of the T variant in the lactase gene that appears to control lactase persistence.
[(a) Adapted from Y. Itan et al., BMC Evolutionary Biology 10, 2010, 36. (b) Adapted from A. Beja- Pereira et al . Nature Genetics 35, 2003, 311- 313 ]
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