Click on image to view larger version.

Fig. 5. Reduction in Egfr activity in the PM is sufficient to cause pattern
duplications in the DP. (A) Wild-type wing blade. (B-H) Adult wing blades of
Ubx-GAL4/UAS-DN-DER (expressed from two copies of the transgene; B),
Ubx-GAL4/UAS-Dras1N17 (C-E), Ubx-GAL4/UAS-DN-Raf
(F), Ubx-GAL4/UAS-Aos (G) and Ubx-GAL4/UAS-rasN17
(dominantnegative form of mammalian Ras; H) flies. Note pattern duplications
(notum-to-wing transformation) in the wing blades and anterior-specific margin
bristles in the transformed region. Associated reduction in notum tissue is
shown in E. In all wing blades, anterior is towards the top.