Expression of TomScer\UAS.cNa driven by Scer\GAL4pnr-MD237 results in tufted macro- and microchaetae at normal positions. Expression of TomScer\UAS.cNa when driven by Scer\GAL4bi-omb-Gal4 in the wing disc leads to an increase in the numbers of sensory organ precursors seen.