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bivalent
(redirected from bivalents)

   Also found in: Dictionary/thesaurus, Wikipedia, Hutchinson 0.07 sec.
bivalent /bi·va·lent/ (bi-va´lent)
2. the structure formed by a pair of homologous chromosomes by synapsis along their length during the zygotene and pachytene stages of the first meiotic prophase.

bi·va·lent (b-vlnt)
adj.
1. Having a valence of 2; divalent.
2. Consisting of a pair of homologous, synapsed chromosomes, as occurs during meiosis; double.
n.
A pair of homologous, synapsed chromosomes associated together during meiosis.

bi·valence, bi·valen·cy n.

bivalent
1. having a valence of two.
2. denoting homologous chromosomes associated in pairs during the first meiotic prophase.

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Several asymetric bivalents were clearly observed, formed by one chromosome with C-heterochromatin (one or two C-blocks) and another without C-heterochromatin (Figure 4).
 
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