Excision of the P{lArB} element in encA309.1M3, removing sequence upstream of the original insertion, while leaving downstream sequences intact.
Imprecise excision of the P{lArB} element present in encA309.1M3.
Mutant egg chambers show defects in karyosome morphology; often the nuclear material is split into two or three lobes. No extra round of germline mitosis is seen in mutant females.
Eggs derived from hemizygous females show a cold-sensitive ventralised egg-shell phenotype. At 18oC, 79% of eggs produced by hemizygous females have a single dorsal appendage and 20% of the egg shells have a further reduction in dorsal appendage material. None of the eggs laid at this temperature hatch. In contrast, at 25oC, 97% of eggs produced by hemizygous females have a wild-type egg shell, and only 3% possess a single dorsal appendage. 29% of the eggs hatch at this temperature. Embryos derived from hemizygous females are variably ventralised. They frequently have a ventral hole centered around abdominal segments A4-A6. In some embryos this hole extends along the entire abdominal region, though in many embryos the head skeleton is still completely intact. The most severely affected embryos have a completely ventralised cuticle, and all structures posterior to A8 are missing, including posterior spiracles, Filzkorper and anal pads.
encR17 has egg chorion phenotype, non-suppressible by mei-41D3
