hypermorphic allele - genetic evidence
Deletion of 3' UTR.
visible | semidominant
wing
Rank of homozygous phenotype: 7. Rank of heterozygous phenotype: 5. (Rank 1 is wild type. Rank 8 is nearly strap like wings.)
Bx7-7-1 has phenotype, suppressible by Df(1)N19