Crossing-over and the centromere.
D001345:Autoradiography; D002842:Chromatids; D002869:Chromosome Aberrations; D003434:Crossing Over, Genetic; D006801:Humans; D066298:In Vitro Techniques; D008214:Lymphocytes / Q000378:metabolism; D008938:Mitosis; D009369:Neoplasms / Q000378:metabolism; D013936:Thymidine / Q000378:metabolism; D014316:Tritium
D014316:Tritium; D013936:Thymidine