Single genes, chromosomal regions and even entire genomes can undergo duplication. What good can come of these extra copies? Evolution seems to use several tricks to take advantage of the situation.
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Louis, E. Making the most of redundancy. Nature 449, 673–674 (2007). https://doi.org/10.1038/449673a
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DOI: https://doi.org/10.1038/449673a
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