Six copies of the bcd gene (bcd^+t8.7 and bcd^+t8) are necessary to rescue some anterior structures in about 5% of tor^RX derived embryos. However not all embryos with rescued labrum and dorsal bridge have a perfectly aligned head skeleton. Occasionally embryos survive long enough to hatch and move around.

Embryos derived from homozygous females and carrying one copy of Ras85D^V12.RpL32 have some posterior terminal structures, such as the A8 ventral denticle belt and the spiracles. Embryos derived from homozygous females and carrying two copies of Ras85D^V12.RpL32 have most exterior posterior terminal structures, including the anal pad and anal tuft.