Crossing over

The exchange of DNA sequences between chromatids of homologous chromosomes during meiosis.

The process by which homologous chromosomes exchange material at meiosis through the breakage and reunion of non-sister chromatids. See: recombination, chiasma.

The breaking during meiosis of one maternal and one paternal chromosome, the exchange of corresponding sections of DNA, and the rejoining of the chromosomes. This process can result in an exchange of alleles between chromosomes. See also: recombination