Figure 5.

scute induces ectopic external sensory organ formation in the eye. Scanning electron micrographs of a compound eye of ato¹ mutant expressing scute (GAL4–7,ato¹/UAS-sc,ato¹) (A and B). In addition to photoreceptors, scute occasionally induces macrochaete-like external sensory organs (arrowhead in A and B and arrow in Fig. 2D) in various locations in the eye. These ectopic sensory bristles are morphologically distinct from surrounding interommatidial bristles (arrow in B). (Magnifications: A, ×110; B, ×700.)