(A) An early L2 hh
ts2 disc without ventral domain. Bolwig’s nerve is marked with an arrow. (B) An early L3 ead with wg-LacZ+ cells at the entire ventral margin. (C) A late-L2 hh
ts2 ead with small dorsal domain without midline cells. (D) An early L3 ead without dorsal posterior domain in contrast to large ventral domain. (E) A late L3 ead without any dorsal dpp-gal4+ cells and only a small number of dorsal wg-LacZ+ cells. (F) Magnified image of C showing the damaged dorsal tissue (arrowhead) with round-shaped cells (arrow). (G) A diagram of hh
ts2 eads, one without the ventral domain, the other with large ventral domain. Scale bar: A, 20 μm; B, C, D, 30 μm; E, 100 μm; F, 10 μm.