univalent

(yū'nĭ-vā'lənt)
adj.

1. Chemistry.
   1. Having valence 1.
   2. Having only one valence.
2. Genetics. Of or relating to a chromosome that is not paired or united with its homologous chromosome during synapsis.

n. Genetics
A univalent chromosome.

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IN BRIEF: Quality or state of having a single chromosome with no synaptic mate.

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1. or monovalent (of a chemical species) having a valency of one.
2. an unpaired chromosome seen during meiosis when bivalents are also present. Such a chromosome either lacks a homologue or results from asynapsis.

—univalency n.

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Having a valence of one.

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