Definition of Chromosome banding

Chromosome banding: The treatment of chromosomes to reveal characteristic patterns of horizontal bands like bar codes.

The banding patterns lend each chromosome a distinctive appearance so the 22 pairs of human nonsex chromosomes and the X and Y chromosomes can be identified and distinguished without ambiguity. Banding also permits the recognition of chromosome deletions (lost segments), chromosome duplications (surplus segments) and other types of structural rearrangements of chromosomes.


Last Editorial Review: 9/20/2012

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