Table 2  Mono-oriented centromeres in wild-type and mutant oocytes
Frequency of mono-oriented centromeresCombined mono-oriented (%)
Bipolar spindlesXSecond chromosomeThird chromosome
Wild-type69/75 (92%)0/24 (0%)4/46 (9%)0/44 (0%)3.5
sub1/sub13125/48 (52%)8/17 (47%)22/39 (56%)10/25 (40%)49.4
IncenpQA267/9 (78%)7/9 (78%)ND6/9 (67%)72.2
ial168916/16 (100%)3/10 (30%)ND0/16 (0%)a
ncd15/18 (83%)ND8/27 (30%)7/28 (25%)27.3
  • ND, not determined.

  • a Not applicable because ial1689 mutants affect only the X chromosome.