duplication, chromosomal

duplication, chromosomal

a type of CHROMOSOMAL MUTATION in which part of a chromosome is replicated, so producing extra copies of those genes contained in the duplicated segment. For example, the ‘Bareye’ mutation in Drosophila is due to a duplication of a segment along the X-CHROMOSOME.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
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