Fig. 3. Phenotypes associated with gbb clones in the anterior compartment. In all cases, the boundaries of the double-sided region of the clone are shown with broken lines. (A) A null gbb clone encompassing the entire anterior compartment. The wing is reduced in size and lacks all of distal L5. (B) Another null gbb clone encompassing the entire anterior compartment where L5 extends to the junction with the PCV (arrow). (C,D) Comparisons between wings bearing large anterior gbb clones (at left) and the wild type opposing wing from the same fly (at right). (C) Control wings with a sha marked clone encompassing the entire anterior compartment. The ratio of left:right (L:R) wing in this case is 0.98. (D) gbb mutant anterior clones result in a dramatic reduction in overall wing size. The ratio of L:R is 0.70.