Polytene chromosomes normal.
Heterozygotes have outheld wings.
Dominant outheld wing phenotype. Postalar bristle and alula are not affected heterozygotes. Transheterozygotes with mirrB1-12 are semi-lethal. Rare adults exhibit outheld wings, the alulae are completely missing and the postalar bristles are removed.
A.T.C. Carpenter.
Strength of alleles (strongest to weakest): mirrSai1 > mirrSaiD1 = mirrSai2 > mirrSaiD3.