The ability of mutant flies to detect motion is approximately 5 times worse than wild-type. The response of mutant flies to a UV/Vis choice test is approximately 8 fold worse than wild-type. Mutants perform well, though less well than wild-type, in counter-current fast phototaxis assays. When homozygous somatic clones are made in the eye so that only mutant R7 cells persist, the response from these flies to a UV/Vis choice test is several times worse than wild-type.
Found in a screen using a retina dependant behavioural test - a UV/Vis light choice assay to assay the function of photoreceptor cell R7.