nurse cell & nucleus | somatic clone
Eggs derived from mosaic egg chambers in which the follicular epithelium is composed of homozygous kayS135103 cells consistently show two phenotypes; the eggs and their respiratory appendages are shorter than normal. In addition, two appendages of different lengths or "paddleless" appendages are often seen. Eggs which appear deflated are laid at a low frequency. The disappearance of nurse cell nuclei that normally occurs in stage 14 egg chambers is delayed in egg chambers in which the follicular epithelium is composed of homozygous kayS135103 cells, with many of the early stage 14 egg chambers containing as many as 15 remaining nurse cell nuclei.
bsk1, kayS135103 has follicle cell phenotype
bsk1, kayS135103 has oocyte | oogenesis stage S9 phenotype
bsk1/bsk[+], kayS135103 has follicle cell phenotype
bsk1/bsk[+], kayS135103 has oocyte | oogenesis stage S9 phenotype
Mosaic egg chambers in which the follicle cells are homozygous for kayS135103 in a bsk1/+ background degenerate during stage 9 and show a complete failure of posteriorwards migration of the main body follicle cells (migration of the border cells appears unaffected).
Due to the location of the P{lacW}kayS135103 insertion it is possible that this insertion may affect kay or fig or both.
The P{lacW}kayS135103 insertion maps within the 17.6 intron of kay 2.3kb 5' of fig.
Precise excision of the insertion reverts the lethal phenotype.