Polytene chromosomes normal.
Deletion including abd-A transcription start site.
Mutations in the transcription unit: breakpoints map to the extremes of the transcription unit (FBrf0042053).
deletion from 55 to 58.5 kb.
First instar larvae exhibit lateral dots (a paired structure found in A1 segment of wild type) in abdominal segment A2 and rarely in A3 and A4.
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.
Morata.
J. Casanova.