Fig. 9.

Activation of Yki does not change the cell fate from eye to antenna. (A) The wild-type expression of Cut (Ct, green), a marker for antennal fate, is restricted to a circular domain in the antennal region, as well as in the cone cells of the eye field. (B) Misexpression of yki^3SA using a bi-Gal4 driver (bi>yki^3SA) at the DV margin suppresses the retinal differentiation, as evident from Elav (red) expression, but does not induce ectopic Cut expression. (C) Misexpression of yki^3SA on the posterior margin of the eye disc using a dpp-Gal4 driver (dpp>yki^3SA) results in suppression of Elav (red) as well as Ct (green) expression. (D-D‴) Random gain-of-function clones of yki^3SA (hsFLP>yki^3SA) marked by (D,D′) GFP (blue) reporter results in suppression (D,D″) Ct (green). (D,D‴) Elav expression (red) is downregulated in yki^3SA clones. The orientation and magnification of imaginal discs and adult heads are identical in all panels.