(A–C′) Side (A–C) or dorsal views (A′–C′) of wild type eye (A, A′), eyes expressing Yki (B, B′) or Yki + Sd (C, C′) with GMR-Gal4. (D–F″) BrdU incorporation (D, E, F), cycE (D′, E′, F′) and diap1 (D″, E″, F″) expression in wild type eye discs (D, D′, D″), or eye discs expressing Yki (E, E′, E″) or Yki +Sd (F, F′, F″). Arrowheads indicate the position of SMW.