st1 and st1/Df(3L)ED4606 mutant adults show a significant and progressive decrease in climbing ability, as compared to controls. Unlike controls, both these mutant adults show a significant and progressive decrease in the number of PPL1 neurons (decreases observed from from day 3 to days 18 and 21, respectively) when raised at 29[o], but not at 25[o]C, as compared to controls.
Mutant flies have significantly fewer synaptic vesicles in the terminals of the photoreceptor cells R1-R6 in the lamina. However, in contrast to the absolute numbers of synaptic vesicles, the profile density is not significantly different from wild type. There is no significant difference in the normalized number of single-headed capitate projection profiles in the photoreceptor terminals, but the number of multiple-headed capitate projection profiles is higher than normal.
Male homozygous st1 flies are undistinguishable from wild-type flies in their sensitivity to enflurane. This effect is true whether enflurane resistance is measured in regular light or red light.
Eye colour: light yellow, with st14.
Malpighian tubule colour: pale yellow.
Eye color autonomous in larval optic discs transplanted into wild-type hosts.