Biologists have identified four processes of evolution, each one leading to changes in the frequency of alleles in a population over time. Often, new genes are developed when a single ancestral gene is duplicated and then altered to acquire novel, more specialized functions. For instance, vertebrates have four different genes for sensing light, all derived from the same ancestral vision gene. This is an example of which evolutionary process?

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asked May 2, 2013 in Genetics by anonymous

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answered May 2, 2013 by anonymous

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