chiasmas

Points of genetic exchange

Chiasmas is the plural of chiasma, an X-shaped crossing point.

In genetics, a chiasma is where chromosomes exchange genetic material during cell division—a crucial source of variation.

In anatomy, the optic chiasma is where the optic nerves cross in the brain.

The alternative plural chiasmatic also appears.

genetic

crossover

Genre-blending work or transition

homologous · DNA · exchange · bivalent · tetrad · prophase · genetic · linkage · alleles · heredity

anatomical

optic

Of the eye

hypothalamus · visual · pathway · fibers · neuroanatomy · bilateral · hemispheres · retinal · ganglion · tract

rhetorical

reversal

Complete change of direction

syntax · Kennedy · mirror · repetition · symmetry · wordplay · contrast · rhetoric · literary · poetry

Opposites
crossing/intersection vs. parallel/separation

chiasmasseparation

State of being apart

divergence

Family

chiasmus, chiasm, chiasma

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