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gene duplication
New genes derived from gene duplication survive because they evolve new, beneficial functions. The original function is also retained as rule, thus the new gene is generally multifunctional.
Related
gene
genes showing lineage-specific variation in copy number
General
molecular term
References
Presgraves DC.
Evolutionary genomics: new genes for new jobs.
Curr Biol. 2005 Jan 26;15(2):R52-3. Review.
PMID: 15668155