Overexpression results in loss of photoreceptor cells.
Reduces the ability of a cell to develop as an R7 cell or as any other photoreceptor.
Removal of one copy of csw from sev::tor13D:Y2546F.hs.sev individuals causes a very significant reduction in ommatidia with multiple R7 cells.
Dominant mutation that attenuates signalling by a temperature sensitive sev allele.