Fig. 4

Observed and simulated expected distributions of progenies with non-Mendelian segregation proportions of the Sb supergene. The distributions of expected numbers were generated by simulation models that simultaneously considered all three supergene-linked loci and accounted for specific sample sizes. The models assume that departures from Mendelian (1:1) segregation ratios arise solely by chance, with one model incorporating correlations between marker segregation ratios (black bars), and the other, more conservative model disregarding this non-independence (gray bars). Small arrows show the mean numbers of expected progenies from 1000 iterations of each model, whereas the large arrow shows the observed proportion of non-Mendelian progenies