Construct: Deletion of 145 bp region including the endogenous hb NREs.
Embryos derived from females expressing hbΔ do not form abdominal segments.
hb protein is expressed uniformly in the posterior half: larvae lack abdominal segments. hb protein accumulates in the pole cells.
hbΔ, nanosbcd.3UTR has embryonic thorax | anterior phenotype, suppressible | maternal effect by bcdΔ
Rescues the residual anterior thoracic defect of embryos from nosbcd.3UTR mothers that have been largely rescued by two maternal copies of bcdΔ.