Amino acid replacement: S554A.
Amino acid replacement: S560A.
The ommatidia of fzAA.Scer\UAS; Scer\GAL4sev.PM181 adult eyes have random chirality and some are symmetrical, with two R3 photoreceptors in place of an R3/R4 pair. This result is identical to that seen with fzScer\UAS.cAa.