The appearance of centrosomes and other mitotic structures is the same in both Df(3R)E(mod)4-1P11/Df(3R)E(mod)4-1P1 and wild-type larval brain cells examined in stages ranging from prophase to telophase.
The combination of alleles Df(3R)E(mod)4-1P11/Df(3R)E(mod)4-1P1 behaves as a null mutation with early pupal lethality. These flies never develop into pharate adults and show no obvious morphological defects.