Non-sister chromatid

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noun, plural: non-sister chromatids

Either of the two chromatids of any of the paired (homologous) chromosomes.


Non-sister (homologous) chromatids form chiasma(ta) to exchange genetic material during meiosis (i.e. Prophase I).

Word origin: Greek khrōma, khrōmat-, color.

Compare: sister chromatid.
See also: homologous chromosomes, chromatid, meiosis.