Dorsal view of neuroblast clones showing Ultrabithorax expression and genetic manipulation in lineage 1. Insets: Ubx expression (magenta) in a mid-clone optical section. (A-C) Wild-type clones. (C) Bundle 1c is absent in A1. (D-F) dronc- clones. (F) Bundle 1c is present in A1. (G-I) Ubx- clones. (I) Bundle 1c is present in A1. (J-K) UAS-Ubx clones. Bundles 1i and 1c are very thin and lack elaboration. White or green, anti-CD8. Ubx: Ultrabithorax.