The labial lobe is absent in mutant embryos.
Homozygotes display a weak cuticle phenotype affecting the odd numbered segments.
Even numbered denticle bands missing.
Partial deletion of odd naked cuticle.
weak embryonic lethal. Embryos lack parts of naked cuticle of T2, A1, A3, A5 and A7 in an irregular fashion. No effect on ftz expression (Carroll and Scott, 1986).
prd RNA expression has been studied in slp11 embryos.
Phenotypic analysis of different slp1 and slp2 alleles establishes an allelic series: slp11 < slp1Δ41E < slp1A509 < slp13 < slp1Δ46G < slp2Δ66C < slp1Δ34B = slp2Δ34B.