bivalent

[ bahy-vey-luhnt, biv-uh- ]

Phonetic (Standard)IPA

adjective

Chemistry.
1. having a valence of two.
2. having two valences, as aluminum with valences of two and three.
Genetics. pertaining to associations of two homologous chromosomes.

Genetics. a pair of bivalent chromosomes, especially when pairing during meiosis.

bivalent

/ baɪˈveɪlənt; ˈbɪvə- /

a structure formed during meiosis consisting of two homologous chromosomes associated together

bivalent

/ bī-vā′lənt /

bi·va·lence [bahy-, vey, -l, uh, ns, biv, -, uh, -l, uh, ns], bi·valen·cy noun

First recorded in 1865–70; bi- ¹ + -valent

For the chromosomes of the heterotype mitosis arise by the looping round, not opening out, of the bivalent chromosomes.

Monoxide, mo-nok′sīd, n. an oxide containing a single oxygen atom in combination with two univalent atoms or one bivalent atom.

Figure 145 is a prophase showing the bivalent chromosomes still connected by linin fibers.

In Tenebrio molitor, the unequal pair behaved in every respect like the other bivalent chromosomes.

Bouquet stage from iron-hæmatoxylin preparations, showing the heterochromosome bivalent (x).

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