Homozygotes have wild type eyes.
E(sina)6L3 is an enhancer of phenotype of sina4
E(sina)6M4/E(sina)6L3, sina4 has wing vein | ectopic phenotype
E(sina)6M4/E(sina)6L3, sina4 has posterior crossvein phenotype
Recessive wing vein phenotype is seen in E(sina)6M4/E(sina)6L3;sina4/sina4 flies, the posterior crossvein is incomplete and sometimes has an additional longitudinal vein branched off the crossvein.