Ras85DN17.sev flies have a weak rough eye phenotype and lack many photoreceptor R7 cells.
Flies carrying Ras85DV12.sev have a mild rough eye phenotype and show loss of R7 cells.
Flies carrying Ras85DN17.sev have a rough eye phenotype caused by the absence of the R7 cell in approximately 25% of ommatidia and a lack of outer photoreceptor cells.
Mutants exhibit a loss of R7 cells (0.757 per ommatidium, compared to 1.0 in wild-type).
Halving the cno+ dose enhances the effect of Ras85DN17.sev resulting in a further decrease in the number of cone cells.
Rough eye phenotype complementary to that of Ras85DV12.sev : approximately 25% of the ommatidia are missing the R7 cell and occasionally an ommatidium lacks an outer photoreceptor cell.