Fig. 6. lines and bowl promote cell survival in the DP and the PE, respectively. (A,D) Control clones, (B,C) lines mutant FLP/FRT clones, (E) drm expressing clones and (F) bowl mutant MARCM clones. Dapi, blue in A-D,F. (A) Control and wild-type twin clones induced at the first instar survived in both the PE and DP. Optical section is at the level of the PE but DP clones are also visible. (B,C) lines mutant clones and twin spots survived in the PE (B), but mostly twin spots survived in the DP (C). (D) Control clones survived in both the DP and the PE. (E) drm-expressing clones were recovered in the PE but not in the DP. Wg expression (red) in the DP is visible. (F) bowl mutant clones survived in the DP but poorly in the PE. Arrowhead indicates a bowl mutant clone near the disc stalk. (G) Quantitative analysis of the recovery of wild-type, bowl and lines mutant clones. To calculate the the percentage recovery, we pooled the number of clones and separately the corresponding wild-type twin spots from several discs. L1, first instar; L2, second instar.