Molecular lesion lies at coordinate 126-129kb.
Separates iab-7 region from Abd-B transcription unit.
Lesion mapped to: 126-129 kb.
Hemizygotes show an iab5,6,7 mutant phenotype: abdominal segments A5-A7 transform towards A4. Heterozygotes with Abd-B point or pseudopoint mutations cause a less severe mutant phenotype, with mixed A5/A6 identity in A6 and A7. Phenotype over UbxMX12, abd-AM1, Abd-BM8 is the same as when over Abd-B-.
Casanova.
J. Casanova.