Also found in: Dictionary, Medical, Wikipedia.
Related to polytene chromosome: lampbrush chromosome
polytene chromosome[′päl·i‚tēn ′krō·mə‚sōm]
A giant, multistranded, chromosome produced by multiple sounds of endoreduplication and thus composed of many copies of the parental chromosome pair having their chromomeres in register. Also known as Balbiani chromosome.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.