Presence of FrlEx83/+, FrlEx88/+ or FrlExK62/+ enhances axon growth phenotypes seen in the mushroom body of DAAMEx1/Y males. Expression of FrlHMS00445 driven by Scer\GAL4ey-OK107 enhances axon growth phenotypes seen in the mushroom body (β but not α lobe) of DAAMEx1/Y males.
One copy of dsh1 enhances the axonal projection defects seen in the α and β lobes of DAAMEx1 mutant mushroom bodies in females. Very few, if any, defects are seen in dsh1 DAAMEx1 double heterozygotes. DAAMEx1 enhances the axon projection phenotypes seen in dsh1/Y males alone. Many of these double hemizygous males exhibit an early growth termination phenotype not seen in either mutant alone.
The mild indirect muscle phenotype seen in DAAMEx1 mutants is strongly enhanced by Act88F6/+. The double mutants have a network of very thin myofibrils which often appear branched and the regular Z-disc and sarcomere organisation is completely abolished.
The mild indirect muscle phenotype seen in DAAMEx1 mutants is enhanced by Tm23/+. The myofibrils are disorganised, with variable width, unequal sarcomere and thin filament length and mini-sarcomeres are common.