Fig. 7. Mosaic analysis of lgl4 wings. (A) Example of lgl4 clones occupying dorsal and ventral wing blade surfaces and causing loss of veins. (B) Schematic representation of ventral (unbroken lines) and dorsal (broken lines) clones in (A) of homozygous lgl4 (-/-) and twin wild-type (+/+) clones. (C) Example of a lgl4 clone (broken line) encompassing the posterior cross-vein that differentiates despite the presence of a large clone in the ventral surface. (D) Example of ectopic vein material within a lgl4 mutant clone.