embryonic central nervous system & neuroblast
A duplicated NB 7-3 is formed in 70% of hemisegments in mutant embryos, and NB 6-4 markers are absent in 100% of hemisegments.
Double mutant phenotype with CrebA mutants is additive.
Row five neuroblasts of the embryonic CNS are transformed into row 3 neuroblasts. CQ neurons are deleted, anterior corner cell, posterior corner cell and RP2 neurons are duplicated, and EL neurons are unaffected.
Head and dorsal closure defects.
In clonal analysis, ectopic bristles are not seen in the naked cuticle.
The expression of l(1)sc is unaltered in early homozygous mutant embryos.