Mutant embryos lack Malpighian tubule tip cells, but the tubules contain a completely wild-type number of cells.
In an unspecified Deficiency that uncovers numb, RP2 neurons are occasionally transformed into a sib fate.
Muscle DA1 is present as a myosin-expressing muscle fiber in only 8% of hemisegments, DA2 is present in 5.5%, DO1 is present in 21% and DO2 is present in 15% of hemisegments in mutant embryos. Subdivision of the somatic, visceral and cardiac muscle progenitors appears to be normal.