Figure 3 .

Classification of rearrangement events that lead to illegitimate mating. (A) Schematic diagram of the three expected classes of genetic events resulting in illegitimate mating. Using diagnostic selection media, mutations in the MAT locus, whole chromosome III loss, and loss of the right arm of chromosome III can be distinguished as class 1, 2, and 3 genetic events, respectively (Lemoine et al. 2005, 2008). (B) We classified ∼200 illegitimate diploids for each strain. The frequencies of the three classes of rearrangements are plotted for the 15 strains with the most elevated levels of illegitimate mating. (C) Ratios of the three classes of rearrangements are plotted for the indicated strains.