Polytene chromosomes normal.
Point mutation.
lch5 chordotonal organs are frequently mislocalised to the dorsal side of abd-AD24 mutant embryos. These mislocalised chordotonal organs lack ligament attachment cells.
The LCh5 neurons are abnormal in homozygous embryos, and are rarely found in a lateral or dorso-lateral position. The LCh5 neurons exhibit a DCh3-like morphology in abd-AD24 hthdtl-S142204 double mutant embryos and are positioned laterally in 17-19% of abdominal segments.
Cuticle preparations of embryos heterozygous with abd-AD24 show transformations of abdominal segments towards an A1 identity.
Two posterior midgut constrictions fail to form.
First instar larvae exhibit lateral dots (a paired structure found in A1 segment of wild type) in abdominal segment A2 to A5 and rarely in A6.
Hemizygous embryonic phenotype displays complete transformation of abdominal parasegments 7, 8 and 9 into parasegment 6 and partial transformation of abdominal parasegments 10 to 13 into parasegment 6 (FBrf0043314).
Abd-BD18, Ubx1, abd-AD24 has ventral nerve cord primordium | embryonic stage phenotype
Abd-BD18, Ubx1, abd-AD24 has larval neuroblast | embryonic stage phenotype
Ubx1, abd-AD24, Abd-BD18 triple mutant embryos show a significantly increased proportion of mitotic neuroblasts in the A9-10 ventral nerve cord segments, and a significantly increased proportion of mitotic neuroblast daughter cells in the A1, A8 and A9-10 ventral nerve cord segments, as compared to controls.
Dp(3;2)D109; abd-AD24, Abd-BD18/Df(3R)Ubx-RS4-8 males are phenotypically indistinguishable from Abd-BD18/Df(3R)Ubx-RS4-8 males in abdominal segmentation and show A5 and A6 identities. Dp(3;2)D109; Ubx1, abd-AD24, Abd-BD18/Df(3R)Ubx-RS4-8 males show A5 and A6 identities while Dp(3;2)D109; Df(3R)RS1-98/Df(3R)Ubx-RS4-8 lack A5 and A6 identities.
Duncan.
I. Duncan.