Supplementary Fig. S3.

Variable cuticle phenotypes at late stages of embryogenesis reflect variability in posterior segmentation gene expression at the blastoderm stage. Cuticle preparations of unhatched first-instar larvae are shown for wild-type (A,F) and homozygous tll mutant embryos ((B)–(E), and (G)–(J)) in lateral ((A)–(E)), and dorsal orientation ((F)–(J)). All tll mutants are missing the A8 denticle belt as well as the telson. Additional defects include fused (arrows in (C), (H), and (I)) and incomplete denticle belts or small denticle patches (asterisks in (D), (E), (I), and (J)).