polymitotic Male sterile, partially female sterile; gametophyte disfunction resulting from failure of regular chromosome distribution at meiosis

polymitotic Polymitotic male sterile tassel: Completely male sterile po1 mutant tassel right resulting from erratic chromosome distribution during gametogenesis

polymitotic Polymitotic microsporocyte: Photomicrograph depicting the reduction in number of chromosomes per microspore after two rounds of polymitotic supernumerary cytokineses (photomicrograph courtesy D. West).