Search Dictionary



Version history

  • Current: Jun 18, 2023.

Crossing over

Crossing over is the exchange of a part of chromatids between two homologous chromosomes.

Crossing over takes place during the prophase of meiosis I at chiasmata.




Definitions in the literature

  • the exchange of corresponding segments of the chromatids of the two homologous chromosomes during meiosis I; occurs at chiasmata [1].
  • Exchange of genetic material between homologous but nonsister chromosomes [2].

Also see: