🧬 Paired chromosomes 🧬 Chromosome pair ⚛️ Two chemical bonds 🧫 Mixed gene marks

bivalent

9.9

A pair of matching chromosomes joined together during the first division of meiosis

noun
/ˈbaɪvəˌlɛnt/

Specialized

: bivalente

In the first division of meiosis, each bivalent consists of two homologous chromosomes that have paired together.
form a bivalent

Examples

Kohli 23 (1) Quadrivalent HPV (2) Bivalent HPV.

Academic text (2016)
Bivalent HPV: RCCTs Quadrivalent HPV: RCCTs

Academic text (2016)
In an allotetraploid (Asub1Asub1Asub2Asub2), for example, two identical genomes are present (Asub1Asub2 and Asub1Asub2) whose chromosomes can now pair perfectly and form bivalents during meiosis.

Academic text (2002)
During meiosis, the homologous chromosomes align and form a bivalent, allowing for genetic recombination.
The formation of bivalents is essential for the proper segregation of chromosomes during cell division.

How Many Chromosomes

multivalent

Specialized

9.9

trivalent

Specialized

1 8.6

bivalent

Specialized

9.9

univalent

Specialized

9.8

Surface Forms

bivalent singular

bivalents plural

Etymology

Bivalent comes from bi- 'two' and valent 'strength' or 'power', and as a noun a bivalent is a pair of matching chromosomes joined together during the first division of meiosis.