Only about 55% of the progeny of hb15; nosBN germ-line clone mothers mated to wild-type fathers hatch into first instar larvae, but most of those that hatch make it to adulthood (42% of all progeny). This embryonic lethality is rescued by nos+t5.7.
Rescues the abdominal segmentation defects seen in embryos derived from nosBN females. Rescues the oogenesis defects seen in nos18 hemizygous females; females lay fertilised eggs and have ovaries of normal size.