chiasma definition

  • noun:
    • Anatomy A crossing or intersection of two tracts, since nerves or ligaments.
    • Genetics the purpose of contact between paired chromatids during meiosis, leading to a cross-shaped setup and representing the cytological manifestation of crossing over.
    • A crossing of two nerves, ligaments etc.
    • The contact point involving the two chromatids of a chromosome during meiosis.
    • identical to chiasm.
    • an intersection or crossing of two tracts by means of the page X

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