Dorsal view of neuroblast clones showing Ultrabithorax expression and genetic manipulation in lineage 9. Insets: Ubx expression (magenta) at mid-clone. (A-C) Wild-type clones. (A) Bundle 9i is robust and curls around leg neuropil in T3. (B) Bundle 9i is reduced and travels adjacent to 9c in A1. (C) Bundle 9i is reduced and travels adjacent to bundle 9c in A2. (D-F) dronc- clones. A second axon bundle appears in all segments. Bundle 9i follows same pattern as in wild-type. (G-I) Ubx- clones. (H) Bundle 9i is robust and curls around leg neuropil in A1. (J-L) UAS-Ubx clones. Bundle 9i is missing or reduced and travels adjacent to bundle 9c in all segments. White or green, anti-CD8. Ubx: Ultrabithorax.