Many oocytes develop normally in ovaries expressing fnga.Scer\UAS under the control of Scer\GAL4fng-c606, although in some egg chambers, there is a failure, at stage 9, of the follicle cells surrounding the nurse cells to migrate normally to the posterior to produce the columnar follicle cells around the oocyte. This ultimately leads to the degeneration of these egg chambers. Similar results are obtained when fnga.Scer\UAS is expressed under the control of Scer\GAL4c709.