Flies expressing P{Sym-UAS-wtrw.RNAi1} (which carries the wtrwRNAi1.Sym.Scer\UAS and wtrwa.RNAi1.Sym.Scer\UAS alleles) under the control of one of Scer\GAL4elav.PLu or Scer\GAL4wtrw.PL show disrupted hygrosensing behaviour; a higher fraction of flies choose moist air (100% humidity) over dry air (0% humidity) compared to wild-type controls in a hygrosensory behaviour assay after five minutes.
Flies expressing P{Sym-UAS-wtrw.RNAi1} (which carries the wtrwRNAi1.Sym.Scer\UAS and wtrwa.RNAi1.Sym.Scer\UAS alleles) under the control of Scer\GAL4nan.PK show normal hygrosensing behaviour.