Mutation of the more highly conserved region of the G motif (FWT) to Ala residues.
Expression of m4G2.Scer\UAS.T:Zzzz\FLAG under the control of Scer\GAL4sca-537.4 results in the production of extra bristles (average 39 extra bristles per fly, total of 26 bristle positions on the notum and head assayed).