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Duplication

Definition(s)

The presence of an extra segment of DNA, resulting in redundant copies of a portion of a gene, an entire gene, or a series of genes, usually caused by unequal crossing-over during gene replication when gametes are formed in meiosis: Definition from: GeneTests from the University of Washington and the National Center for Biotechnology Information
Duplication is a type of mutation that involves the production of one or more copies of a gene or region of a chromosome. Gene and chromosome duplications occur in all organisms, though they are especially prominent among plants. Gene duplication is an important mechanism by which evolution occurs.: Definition from: Talking Glossary of Genetic Terms from the National Human Genome Research Institute


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