Vast majority of wrapperR175 homozygous embryos fail to hatch into larvae but some make to third instar stage and of those about half survive to adulthood.
The initial stages of commissure formation appear normal in homozygous embryos. However, at stage 16, abnormalities are seen in commissural architecture; the two commissures fail to separate completely and several axon bundles straddle and wander in the area between the two commissures.
Expression of wrapperScer\UAS.cNa under the control of Scer\GAL4wrapper.CH321-61P08 rescues the near complete embryonic lethality of wrapperR175 homozygous mutants - the rescued embryos display larval hatching and adult eclosion rates that are comparable to wild-type.