giant chromosome


Also found in: Encyclopedia.

pol·y·tene chro·mo·some

a stage of chromosome division that forms the giant chromosome found in the salivary gland of dipterous insects; the great width is the result of repeated divisions of the chromonema without subsequent lengthwise separation of the filaments.
Synonym(s): giant chromosome (1)

giant chromosome

any of the excessively large chromosomes found in insects and certain other animals, including the lampbrush and polytene chromosomes.