Fig. 5. Influence of dachs on polarity. (A-H) Regions of abdomens. (C,F,G) Mutant clones, marked by yellow bristles (asterisks). (A) Wild type; hairs point posteriorly. (B) fat⁸/fat^G-rv; hair polarity is severely disturbed. (C) fat⁸ mutant clones; hair polarity is severely disturbed. (D) d^GC13; hairs point posteriorly. (E) fat⁸ d^GC13; hair polarity is moderately disturbed. (F) fat⁸ d^GC13 mutant clones; hair polarity is moderately disturbed. (G) d^GC13 mutant clones; hair polarity appears normal. (H) d^GC13 ck¹³ double mutant clones (outlined); polarity can not be assessed within the clone because of ck, but polarity outside the clones appears normal. (I) High-magnification of a region of a d^GC13/Df(2L)ED623 wing, most hairs point distally, as in wild type. (J-N) Eye discs, stained for Elav (red) and Prospero (green). Arrows indicate ommatidial orientation. (J) Wild type, (K) d^GC13. (L-N) Mutant clones, marked by absence of GFP (blue in upper panels, white in lower panels). Ommatidia that are mis-rotated by more than 90° are marked by yellow arrows. To compensate for tissue curvature, some panels are composites of multiple focal planes.