Overexpression of Cf2s.hs can reduce the dorsalising effects, 10% of eggs display two distinct dorsal appendages. Overexpression during oogenesis similarly rescues the maternal dorsalising effect so 12% of embryos have restored ventral denticles.
fs(1)K101; Egfrtop-18A or fs(1)K101; grk3 double mutant females produce eggs with ventralised eggshells and embryos. fs(1)K101/fs(1)K101; Ras85Dix13b/Ras85De2F females lay eggs that range from strongly dorsalised to weakly ventralised, indistinguishable from Ras85D mutant eggs. The embryos range from strongly dorsalised to weakly dorsalised, to almost normal with slight head defects.
Wieschaus, Marsh and Gehring (1978).