The pea that Mendel worked with, Pisum sativum, is self-pollinating. Mendel is walking through the countryside reading a book, when, unknown to him, a pea seed of his F1 hybrid generation falls out of his pocket. It finds moist soil and germinates. Suppose that this pea is able to propagate itself over three generations (not counting the initial pea). Looking at just one pair of alleles (any pair), and uming that each pea plant of each generation produces four successful offspring, how do the genotype ratios change over time? Is evolution occurring?
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