noun (plural chiasmata /-tə/)
2 Biology A point at which paired chromosomes remain in contact during the first metaphase of meiosis, and at which crossing over and exchange of genetic material occur between the strands.
More example sentences
- A given factor s can affect the recombination rate r through a change in the number of chiasmata occurring during meiosis.
- However, the observed differences may be conditional on the chromosomal location of the chiasmata.
- First, it generates crossovers between homologous chromosomes that mature into visible chiasmata.
Definition of chiasma in:
- The US English dictionary