Fig. 1. Genetic screen to identify dominant interactions with tai. (A) Nomarski optics image of an ovariole stained for ß-galactosidase activity from the enhancer trap PZ8685, showing the germarium stage (far left) to stage 10 (S10; far right). PZ8685 is detected primarily in the border cells (bc, arrows), which migrate at stage 9 (S9) through the nurse cell cluster (nc). The border cells complete their migration at stage 10, when they reach the anterior border of the oocyte. (B,C) Representative examples of border cell (arrows) migration defects observed in stage 10 egg chambers heterozygous for tai^61G1 (tai) and either Df(1)N19 (B) or Df(3)GN24 (C). (D) Crossing scheme used for the tai genetic interaction screen. The arrowheads in A-C indicate the extent of rearrangement of the outer follicle cells (ofc). Anterior is towards the left in all panels. Df, deficiency.

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