55% of fzy4 mutant clones generated in the brain during the larval stages do not contain neuroblasts, compared to <10% in controls.
Unlike in wild type, fzy4 mutant neuroepithelial cell clones in the larval optic lobe fail to proliferate.
Unlike in wild type, almost all fzy4 mutant neuroblast clones in the larval brain fail to proliferate.
fzy5032/fzy4 mutant neuroblasts maintain a single nucleus and cell diameters are similar to wild type.
At 25oC, embryonic lethal, ventral epidermis absent, CNS degenerate, PNS absent. At 18oC, embryonic lethal, holes in ventral epidermis, CNS degenerate.