Expression of mib2^{dsRNA.Scer\UAS} under the control of Scer\GAL4¹¹⁵¹ results in defects in the indirect flight muscles (IFMs) of newly emerged adults; the M bands are poorly defined, and the Z bands are less dense than normal and occasionally have a zigzagging shape. 2-3 day old flies are flightless and unable to jump and their thoraces have empty cavities, due to a loss of muscle mass. The remaining IFMs lack myofibrils, although both thick and thin filaments are present, and only possess remnants of electron-dense material, which resemble Z bands.