Pupariation is delayed in tor4 mutant larvae.
Embryos derived from tor4 females lack structures posterior to the 7th abdominal segment and the head regions are missing.
The stomatogastric nervous system, epiphysis, dorsopharyngeal organ and pharyngeal chordotonal organ are absent. Other sensory organs of the head develop normally. The brain hemispheres and optic lobes are fused medially.
Oesophagus, stomatogastric nervous system, labral nerve, epiphysis, dorsopharyngeal organ and pharyngeal monoscolopidial chordotonal organ are deleted.
Defective in gonad assembly when homozygous and in double mutant combination with dl.
Suppresses "splice" phenotype of torNRE, presumably because product is appropriately positioned to block diffusion of the tor ligand, even though it cannot transduce the terminal signal.
Terminal structures are missing, abdominal segment 7 is the posterior-most point, head skeleton is collapsed.
Posterior defect is significantly suppressed, in a dose-dependent manner, by Dsor1Su1.
Little or no tll expression is detected in the posterior of syncytial or cellular blastoderm embryos, at the anterior the early tll cap does not appear and an abnormal anterior tll stripe appears by the late syncytial blastoderm.
Dorsalized embryos: all cuticle cells along the dorsoventral axis behave like dorsal cells of the wild type embryo. zen expression pattern refines at stage 5, dpp pattern does not refine at all, twi and sna are expressed during late stages of embryogenesis. Differentiated embryos lack the labrum, head skeleton is reduced in size and all structures posterior to the seventh abdominal segment are deleted.
Embryos derived from homozygous tor4 females lack the median tooth of the labrum and the pharyngeal arms of the head skeleton are variably reduced. All structures posterior to abdominal segment 7 are absent.
Eggs derived from homozygous females cellularise normally but become abnormal at gastrulation; the cephalic furrow is shifted forward, the posterior midgut is missing and the germband forms to the posterior end of the embryo. The embryos lack anterior head structures and structures posterior to segment A7 (the labral segment and telson).