Expression of B0911B0911 under the control of Scer\GAL4dpp.blk1 results in a gap in wing vein L3. The arista is variably reduced or missing. Legs sometimes have only 4 tarsal segments and 1 claw.
Expression of B0911B0911 under the control of Scer\GAL4dpp.blk1 results in a gap in wing vein L3 and the anterior crossvein can be missing.