Fig. 7. drl genetically interacts with Src64 and Src42 in the salivary glands. (A-F) Lateral views of stage 15-16 Drosophila embryos stained with FKH and CRB. (A) Wild-type control. (B) Src64^P1 embryos closely resemble drl^R343 embryos. (C) drl^R343 and Src64^P1 doubly heterozygous embryos exhibit ventral curving of the salivary gland tips. (D,E) The salivary glands in Src42^E1 show a variety of defects, including ventral curving at the tip of the glands (D) and curving that affects a large portion of the length of the gland (E). Embryos heterozygous for both drl^R343 and Src42^E1 resemble drl^R343 embryos. (G) Graphical representation of phenotypic penetrance in embryos scored for salivary gland migration defects at stages 14-16.