title: The mechanism of ring chromosome formation and somatic crossing-over.
mesh_terms: D002842:Chromatids; D002869:Chromosome Aberrations / Q000528:radiation effects; D003434:Crossing Over, Genetic; D004247:DNA; D008853:Microscopy; D008938:Mitosis; D010944:Plants; D011831:Radiation Genetics
chemical_list: D004247:DNA