Fig. 5. Involvement of PcG, trxG and lama genes in transdetermination. The frequency of transdetermination was determined (A) by vgBE-lacZ expression and (B) by the occurrence of wing cuticle for control discs, PcG heterozygous mutant discs [Scm, E(z), Pc, E(Pc), and Su(z)2], trxG heterozygous mutant discs (brm and osa) and homozygous lama mutant discs. The frequency of wing cuticle could not be measured for Su(z)2 as no adult survivors were recovered and it was not determined for brm. (C) Determinations of the relative area of transdetermination compared the area of vgBE-lacZ expressing cells with the total disc area (%). For details of the genetic background and t-test statistics, see the legend to Table S11 in the supplementary material.