In the larval eye discs of csw13-87 mutants only a few photoreceptors develop along the morphogenetic furrow. The residual photoreceptors are mostly R8 cells.
csw13-87/Y males carrying cswR32K.hs.2sev or cswR137K.hs.2sev have smooth eyes with normally constructed ommatidia.
Has no "Enhancer of sev" activity. Clones of mutant cells induced during the first larval instar only rarely develop photoreceptors.
csw13-87 germline clone mosaics cause maternal effect lethality. Embryos derived from mothers with germline clones that exhibit a corkscrew cuticle phenotype (71%) have slight paternal rescue of the germline clone phenotype, embryos that do not receive a wild type copy from their father (29%), null embryos, die with a 'U'-shaped cuticle phenotype.
Abnormal development of terminal internal structures. Syncytial and cellular blastoderm embryos show reduced posterior tll domain. hb remains as a posterior cap and the seventh ftz stripe expands posteriorly, both due to lack of hkb repressing activity.
csw13-87 has phenotype, suppressible by csw::Src64Bhs.2sev
csw13-87 has photoreceptor | larval stage phenotype, non-suppressible by Hpyl\cagAUAS.Tag:HA/Scer\GAL4GMR.PF
csw13-87 has photoreceptor | larval stage phenotype, non-suppressible by Hpyl\cagAUAS.Tag:HA/Scer\GAL4hs.PB
csw13-87 has phenotype, non-suppressible by csw::Src64BC583S.hs.2sev
Expression of Zzzz\cagAScer\UAS.T:Ivir\HA1 under the control of either Scer\GAL4GMR.PF or Scer\GAL4hs.PB does not significantly increase the number of photoreceptors seen in csw13-87 mutant larval eye discs.
csw13-87 is rescued by cswΔin.hs.2sev
csw13-87 is rescued by cswΔtail.hs.2sev
csw13-87 is rescued by cswR32K.hs.2sev
csw13-87 is rescued by cswR137K.hs.2sev
csw13-87 is rescued by cswhs.2sev
csw13-87 is partially rescued by cswUAS.Tag:FLAG/Scer\GAL4GMR.PF
csw13-87 is partially rescued by cswUAS.Tag:FLAG/Scer\GAL4hs.PB
csw13-87 is not rescued by cswG547E.hs.2sev
csw13-87 is not rescued by cswSH2SH2.hs.2sev
csw13-87 is not rescued by cswCS.hs.2sev
csw13-87 is not rescued by cswR32K.R137K.hs.2sev
Expression of cswScer\UAS.T:Zzzz\FLAG under the control of either Scer\GAL4GMR.PF or Scer\GAL4hs.PB significantly increases the number of photoreceptors seen in csw13-87 mutant larval eye discs.
Phenotypic series of csw mutant embryos derived from homozygous germline clones, classified according to cuticular phenotype: csw5 = cswLE120 > csw1 = csw13-87 > cswe13d.3 > csw7 = csw6.