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Related to lampbrush chromosome: Polytene chromosome
lamp·brush chro·mo·some, lamp-brush chromosome
1. a large chromosome found in oocytes of certain animals characterized by many fine lateral projections giving the appearance of a test tube brush or lampbrush.
2. multiply looped chromosomal area of the chromatin of some species.
Synonym(s): giant chromosome (2)
A large chromosome found especially in the immature eggs of amphibians, consisting of two long strands that form many brushlike loops along the main axis of the chromosome.