100% of brrbp-2/brnpr-3 larvae are able to pupate, but ~15% die as early pupae. 80% of these survive to late pharate adult stage, with ~20% failing to eclose. brrbp-2 females show slightly reduced levels of oviposition compared to wild-type females. brrbp-2 flies show the same susceptibility to methoprene as wild-type flies.
Eggs dissected from homozygous brrbp-2 mothers have shortened dorsal appendages. brrbp-2/brnpr-6 females live for two days before dying having laid no eggs. Their ovaries are not completely developed, and the few late stage oocytes that were formed had no appendages.
DVM number is reduced (a deficit in thoracic muscle precursors), as is the flight performance.
Heterozygotes with brrbp-5 display reduced mechanosensory bristles on the maxillary palps and indentations on the surface of the eye.
Morphological abnormalities: 15--100% penetrance of bristle abnormalities under T(1;2)dorvar7 variegation.
Reduced bristle number on palpus, faded wings and swollen abdomen. Rare survivors when heterozygous with Df(1)RA19, lethal phase is after the formation of imaginal organs.
Homozygotes exhibit reduction of the palpal bristles. brrbp-2/brnpr-5 and brrbp-2/brnpr-6 combination is lethal, rare adult escapers show a reduction of the bristle number on the palpus. Heterozygotes with Df(1)br25 have normal viability and reduced bristle number on the palpus.
Homozygotes and males survive with fewer than normal bristles on the palpus; when raised at 29oC, females exhibit faded wings and swollen abdomens; when raised at 18oC males have faded wings. brrbp-2/Df(1)RA19 females virtually lethal; females carrying brrbp-2 and any of the other 'rbp' alleles are completely viable when reared at 18oC, but at higher temperatures most die and escapers have reduced bristles on the palpus, shortened bristles on the scutellum, shrivelled or swollen abdomen shrivelled wings and eyes with crumpled surface.