Fig. 8. Survival and cell-autonomous defects of late-induced borr mutant clones. (A) Adult wing blade, with borr mutant clone (marked by f, outlined in yellow) and associated twin spot (marked by ck, outlined in grey). (B-D) Single confocal section through the epithelial sheet of a pupal wing blade with borr mutant clones (marked by absence of GFP), grazing the bases of the cell nuclei within the epithelial plane, stained as indicated in the panels; arrows indicate individual giant borr mutant cells. (E) Margin area from a wing bearing borr mutant clones with a giant bristle. (F-H) Single confocal section through a pupal wing, stained as in B-D and also with Hoechst dye. An individual large borr mutant cell (lacking GFP) gives rise to a giant bristle. ß-Tubulin staining is absent at the base of the bristle, indicating the lack of a socket.