Fig. 3. Mutant muscle arm phenotypes. In all panels, BWMs of the dorsal right quadrant are shown. Dorsal is up, and anterior is to the right. All animals shown contain the trIs30 transgene. (A) An RP247 trIs30 animal with muscles 9-19 indicated with the number of muscle arms shown in brackets. The dorsal cord (not shown) is indicated with the blue arrow. In all subsequent panels, muscle number 11 is indicated with a green arrow for reference, select muscle arm termini defects are indicated with a red arrow, some flowing lateral muscle ends are indicated with a red arrowhead. (B) Note the arborized muscle arms (red arrow) and flowing lateral muscle ends (red arrowheads). (C) Note the fewer muscle arms, the errant membrane projections (yellow arrowhead), and flowing lateral muscle ends (red arrowhead). A commissural neuron whose fluorescence is bleeding through to the YFP channel is indicated with a blue arrow in E-H. Scale bars: 50 µm.