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Related to bivalent chromosome: Meiosis 1
bivalent chromosome[bī′vā·lənt ′krō·mə‚sōm]
(cell and molecular biology)
The structure formed following synapsis of a pair of homologous chromosomes from the zygotene stage of meiosis up to the beginning of anaphase.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.