Fig. 7. The meiotic recombination checkpoint is impaired in the cdc25-9A phosphorylation site mutant. Meiotic time courses of cdc25-9A (S1308; top panel), meu13 (S1306; middle panel) and meu13 cdc25-9A (S1307, lower panel) strains. The percentages of cells that have undergone the first meiotic division (2 nuclei) or both meiotic divisions (3/4 nuclei) are shown. Arrows pointing to the percentage of binucleate cells at the 4 hour time point are presented to highlight the suppression of the meu13 delay by the cdc25-9A mutation.