bivalent

bivalent In genetics, applied to two homologous chromosomes when they are paired during the prophase of the first meiotic division (see MEIOSIS). Bivalents do not occur during prophase II, because homologous chromosomes have segregated.

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MICHAEL ALLABY. "bivalent." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 13 Feb. 2012 <http://www.encyclopedia.com>.

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