Biologists have identified four processes of evolution, each one leading to changes in the frequency of alleles in a population over time. In a given population of butterflies, there are equal numbers of yellow butterflies and orange butterflies. A wildfire sweeps through their habitat, killing all but 50 yellow butterflies and 5 orange butterflies (numbers determined by random chance). The change in allele frequency is strongly influenced by the bottleneck effect, with breeding among a small number of individuals. This is an example of which evolutionary process?

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asked May 2, 2013 in Genetics by anonymous

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Genetic drift
answered May 2, 2013 by anonymous

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