BIO220H1 Study Guide - Final Guide: Lactase Persistence, Lactose Intolerance, Lactase

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BIO220H1 Full Course Notes
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BIO220H1 Full Course Notes
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Coevolution: that reciprocal evolutionary response between species as a consequence of natural selection having been imposed on each other, by each other. Wolves prey on moose and impose selection, and the subsequent generation of moose due to the wolves" selection, which selections for wolves with certain attribute. It can also happen within a species between the sexes. One sex can impose changes in the other sexual dimorphism and sexual antagonism. Natural selection: interaction between ecology and genetic. The ecology is what generates natural selection. The genetics provides the materials to be passed throughout the generations. But culture comes into play as well. Humans need milk, especially breast milk at infancy. The baby drinks lactose, and needs lactase into glucose and glactose. Lactase production normally declines in adulthood, with the exception of people of northern. Origins in europe, lactase production persists throughout adulthood. The substitutions are the causal variants (happens to be linked but not causal)

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