abnormal neuroanatomy (with hb15), with Scer\GAL4en-e16E, hbUAS.cWa
abnormal neuroanatomy (with hb15), with Scer\GAL4en-e16E, hbUAS.VP16
abnormal neuroanatomy (with hb15), with Scer\GAL4en-e16E, hbΔAB.VP16.UAS
abnormal neuroanatomy (with hb15), with Scer\GAL4en-e16E, hbΔB.VP16.UAS
abnormal neuroanatomy (with hb15), with Scer\GAL4en-e16E, hbΔD.VP16.UAS
abnormal neuroanatomy (with hb15), with Scer\GAL4en-e16E, hbΔDMZ.VP16.UAS
abnormal neuroanatomy (with hb15), with Scer\GAL4en-e16E, hbΔE.VP16.UAS
larval DA2 motor neuron | increased number (with hb15), with Scer\GAL4en-e16E, hbΔD.VP16.UAS
larval DA2 motor neuron | increased number (with hb15), with Scer\GAL4en-e16E, hbΔDMZ.VP16.UAS
larval DO1 motor neuron (with hb15), with Scer\GAL4en-e16E, hbΔD.VP16.UAS
larval DO1 motor neuron (with hb15), with Scer\GAL4en-e16E, hbΔDMZ.VP16.UAS
larval DO2 motor neuron (with hb15), with Scer\GAL4en-e16E, hbΔD.VP16.UAS
larval DO2 motor neuron (with hb15), with Scer\GAL4en-e16E, hbΔDMZ.VP16.UAS
U neuron (with hb15), with Scer\GAL4en-e16E, hbUAS.VP16
U neuron | increased number (with hb15), with Scer\GAL4en-e16E, hbUAS.cWa
U neuron | increased number (with hb15), with Scer\GAL4en-e16E, hbΔAB.VP16.UAS
U neuron | increased number (with hb15), with Scer\GAL4en-e16E, hbΔB.VP16.UAS
U neuron | increased number (with hb15), with Scer\GAL4en-e16E, hbΔE.VP16.UAS
hbP1only/hb15 transheterozygotes present a significant decrease in the number of dividing neuroblasts during stages 13 and 14 of embryogenesis and present a significant decrease in the number of dividing neuroblast daughters during stage 13, but not stage 14, of embryogenesis, as compared to controls; these embryos, however, show no significant differences in the number of neuroblasts, as compared to controls.
In wild-type, neuroblast NB7-1 generates five U motoneurons. Overexpression of hbScer\UAS.T:Hsim\VP16 in hb15/hbP1only mutant NB7-1 under the control of Scer\GAL4en-e16E produces an average of six U neurons per hemisegment.
In wild-type, neuroblast NB7-1 generates five U motoneurons. Overexpression of hbScer\UAS.cWa in hb15/hbP1only mutant NB7-1 under the control of Scer\GAL4en-e16E produces an average of 12 U neurons per hemisegment.
When one copy of hbP1only is supplied zygotically (via the father) to hb12/hb15 embryos the A7/A8 fusion mutant phenotype is rescued. When one copy of hbP1only is supplied maternally both the A7/A8 and anterior labial and T1 segments are rescued; only T2 and T3 remain unrescued. When the maternal contribution of hbP1only is increased (three copies) 30% rescued embryos show only the maternal rescue of labial and T1 segments. Most show additional rescue of thoracic segments of mostly T3 character. 5-10% of embryos show rescue of all thoracic segments.
Removal of the bcd-dependent P2 promoter uncouples the direct link between the bcd and hb morphogen systems.