Fig. 4. Fj affects segmentation and growth non-autonomously. Portions of tarsi of adult legs containing flip-out clones expressing fj. The fj-expressing clones are marked with yellow and are outlined. (A) Wild type. Arrows indicate that joints are visible around the circumference of the leg. (B) fj-expressing clone in T2-T4. Arrows denote the extent of joint structures, which do not form around the circumference of the leg. Note that joint formation is inhibited far from the cells expressing fj. (C) fj-expressing clone in T2-T3. A leg outgrowth is induced nonautonomously (arrow); the outgrowth does not include any yellow bristles.