Definition of chiasma in English:
noun (plural chiasmata /-mətə/)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. See also optic chiasma.
- 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:
- British & World English dictionary