noun, plural: bivalents
(genetics) A pair of homologous chromosomes in synapsis during meiosis.
(chemistry) Of, or having a valence of two; divalent.
(genetics) Of, or pertaining to the bivalent structure or the association of the two homologous chromosomes during meiosis.
In genetics, a bivalent refers to the two homologous chromosomes that have already joined or paired together in synapsis at Prophase I of Meiosis I.
Word origin: bi- (two) + valent from valence
Related forms: bivalence (noun)
Compare: univalent, polyvalent
See also: valence