Amino acid replacement Y2546F (this mutation is in the sev portion of the fusion gene).
sev::tor13D:Y2546F.hs.sev, sev14 has ommatidium phenotype
In a sev14 background, flies carrying one copy of sev::tor13D:Y2546F.hs.sev have smooth eyes. Number of R7 cells per ommatidium is 0.3 +/- 0.3 (n=241). Some ommatidia still contain one R7 cell. Flies carrying two copies of sev::tor13D:Y2546F.hs.sev have rough eyes with ommatidia with multiple R7 cells as for sev::tor13D.hs.sev.