Figure 8.

Defects in the cuticle thickness of Khc^null bristles. Wild-type (A, C, and E; Khc²⁰/Khc⁺ or Khc⁺/Khc⁺) and null (B, D, and F; Khc²⁰/Khc²⁰) anterior scutellar macrochaetae (∼340 μm long) were serial sectioned completely. Pairs of sections from equivalent positions along the lengths of the bristles are shown. (A and B) Tip; (C and D) middle; (E and F) base. In E and F, the images are oriented with the dorsal sides of the bristles at the top. Note that the cuticle of the Khc^null bristle is thin at the middle and tip. Bar, 500 nm.