Figure 4. Class I crossovers are absent in hei10 mutants.

Immunolocalisation of MLH1 in wild type (Wt, A–B) and hei10-2 (C–D) mutant PMCs at diakinesis. For each genotype the MLH1 signal alone (A, C) or a merge signal with DAPI staining is shown. With DAPI, centromeres are stained more intensively than the chromosome arms. The arrow indicates a residual chiasma in hei10-2. Bar: 10 mm.