Figure S3.

Phenotypes of flies with ectopic expression of Numb or NIP in the wing disc. The ap-Gal4 was used to induce the ectopic expression of Numb (A) and NIP (B) in the wing disc. Ectopic expression of Numb resulted in a bald notum (A) whereas over-expression of NIP did not result in a significant defect. The absence of a few hairs in the ap-Gal4/UAS-nip flies (B) was most likely due to Gal4 instead of NIP because it was also observed when ap-Gal4 was crossed with wild type flies (data not shown).