Figure 6.

Overexpression of pnr can enhance the L mutant phenotype. (A) L²/+ eye disc showing selective loss of ventral eye indicated by dotted line. (B) Overexpression of pnr in the wild-type eye, using ey-GAL4 driver (ey>pnr), resulted in reduction of the eye field. (C and D) Overexpression of pnr in the L²/+ mutant eye background (L²/+; ey>pnr) resulted in loss of complete eye field as seen in the eye imaginal disc (C) and the in adult eye (D). Note that antennal structures (arrowhead) and the mouthparts of adult flies are not affected.