Fig. 1. Schematic of wild-type ovariole. The arrangement and fates of different cells in the germarium and in stage 2 (S2) and stage 9 (S9) follicles are indicated: oocyte nucleus (brown) other germline cell nuclei (gray), main-body follicle cell nuclei (black), polar cell nuclei (red) and stalk cell nuclei (green). The border cells include the anterior polar cells and several main-body follicle cells, and migrate between the nurse cells at stage 9. Roman numerals indicate different regions of the germarium. In all figures, anterior is towards the left.