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Fig. 9. Genetic interaction between ss, Dll, dan and danr. (A) Basal capsule of spineless114.4 heterozygous arista shows a mild defect (compare with Fig. 7D). (B) spineless114.4/danrex35 double heterozygote. (C) spineless114.4/dan danrex56 double heterozygote. Note the two-segmented appearance and bracted bristles. (D) DllSA1/+ heterozygote. The basal capsule appears nearly normal. (E) DllSA1/+ danrex35/+ double heterozygote. (F) DllSA1/+ dan danrex56/+ double heterozygote. Stout ectopic bristles were formed on the basal capsule. (G) spineless114.4 dan danrex56/dan danrex56 antenna. Note the more extensive transformation of arista to tarsus.