chiasma
noun
a crossing or decussation, as that of the optic nerves at the base of the brain.
chiasmata
-
pluralof chiasma.plural
The grammatical form denoting more than one person, place, thing, or idea.
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The chiasmata remain until anaphase I. The number of chiasmata varies according to the species and the length of the chromosome.
From Textbooks ● Jun. 9, 2022
Scientists thought chiasmata were a variation on synapsis and could not understand how chromosomes could break and rejoin.
From Textbooks ● Jun. 9, 2022
These assemblies mark the points of later chiasmata and mediate the multistep process of crossover—or genetic recombination—between the non-sister chromatids.
From Textbooks ● Jun. 9, 2022
The homologous chromosomes are still held together at chiasmata.
From Textbooks ● Jun. 9, 2022
As prophase I progresses, the close association between homologous chromosomes begins to break down, and the chromosomes continue to condense, although the homologous chromosomes remain attached to each other at chiasmata.
From Textbooks ● Apr. 25, 2013
