(A) Quantification of type II neuroblasts per brain lobe is shown for Wor-GAL4 driving expression of NumbΔAB, NumbS2A, or NumbS2D. (n = 5 per genotype) (B–F) Compared to wild-type flies, overexpression of NumbΔAB, NumbS2A, NumbS2D, or NumbΔC driven by Sca-GAL4 leads to a loss of scutellar bristles. (n = 259, 187, 83, and 34, respectively) (G) Quantification of the number of bristles per scutellum is shown for Sca-GAL4 driving expression of NumbΔAB, NumbS2A, or NumbS2D.