Fig. 6. Abnormal bristles in ik2 adult escapers, analyzed by scanning electron microscopy. (A-F) Bristles in the eye. The ommatidia of the wild-type compound eye are arranged in an orderly pattern (A), whereas the compound eyes of ik2 escaper adults (B) appear rough. At higher magnification, the interommatidial bristles can be seen at alternating vertices of wild type (C), but ik2 bristles are often duplicated at a single vertex (D). The wild-type interommatidial bristle is a long, tapered, actin-based structure (E), whereas the ik2 interommatidial bristles are misshapen and kinked (F). (G,H) Humeral bristles from wild type (G) and from an ik2¹ homozygous adult escaper (H).