Crossing Over (Genetic Recombination)
Discovery of Crossing Over: Belgian Cytologist Janssens (1909) noticed chiasmata formation during the prophase of meiosis I. Morgan (1910) found that chiasmata formation leads to the crossing over of alleles by breakage and reunion of homologous chromosomes. What is Crossing Over? Crossing Over occurs during meiosis I while homologous chromosomes have synapsed. Crossing Over may be …