Comparison of phenotype distribution between RNAi-surveyed C. elegans genes, and C. onchophora and O. ostertagi homologues to C. elegans genes with similar phenotypes. (A). The percent of C. oncophora peptides encoded by transcripts expressed in free-living stages (egg, L1, L2 and L3sh) with homologs to C. elegans proteins with various RNAi phenotypes. (B). The percent of O. ostertagi peptides encoded by transcripts expressed in parasitic stages (L3ex, L4 and adult) with homologs to C. elegans proteins with various RNAi phenotypes. “*” indicates that for a specific RNAi phenotype, significantly more (p < 0.05) peptides in either C. oncophora or O. ostertagi exhibited that phenotype than did C. elegans.