Journal
GENETICA
Volume 118, Issue 2-3, Pages 279-294Publisher
KLUWER ACADEMIC PUBL
DOI: 10.1023/A:1024194802441
Keywords
evolution of new gene function; gene families; gene silencing; neofunctionalization; pseudogenes; subfunctionalization
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The ultimate fate of a duplicated gene is that it either silenced through inactivating mutations or both copies are maintained by selection. This later fate can occur via neofunctionalization wherein one copy acquires a new function or by subfunctionalization wherein the original function of the gene is partitioned across both copies. The relative probabilities of these three different fates involve often very subtle iterations between of population size, mutation rate, and selection. All three of these fates are critical to the expansion and diversification of gene families.
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