Genetic interactions between rhogap19d and other polarity factors. A histogram showing the penetrance of the germline invasion phenotype of large rhogap19d mutant clones in combination with other polarity mutants. Removing one copy of scrib, lgl, or Pak1 strongly enhances the penetrance of the invasion phenotype. rhogap19d;fasII double-mutant clones and rhogap19d clones in which nrg has been depleted by RNAi also show a highly penetrant invasive phenotype. Loss of one copy of aPKC, gek, crb, or par-1 strongly reduces the frequency of invasions. The error bars represent SEM; *, P < 0.05; **, P < 0.002; ****, P < 0.0001. All numerical data are presented in the table.