Adults respond normally to sucrose and sodium chloride in a feeding preference test. The threshold of avoidance of quinine is increased compared to wild-type. This phenotype is partially dominant. Homozygous adults show a normal electrophysiological response from the labellar chemoreceptors in response to 100mM NaCl or sucrose.

rearing at 28^oC leads to aberrant responses of adults, but development at low temperature leads to normal-behaving flies. temperature-sensitive