Construct: Nucleotide substitution: G9T. Encodes a maternal hb mRNA in which the endogenous wild-type nos response elements (NREs) have been deleted, and two copies of a mutant NRE have been inserted.
viable
embryonic abdominal segment
Embryos expressing hbNRE.G9U have 6 abdominal segments, and most embryos develop into viable adults.