Figure 6.
Germ-line and follicle-cell clonal analysis of tsu. Egg chambers are oriented with anterior to the left and posterior to the right. In B–E the arrowheads indicate the accumulation of osk mRNA. (A) Immunolocalization of Tsunagi in a stage-9 egg chamber showing a tsu1/tsu1 follicle-cell clone with its boundaries delineated by the arrows. (B,C) The distribution of osk mRNA in wild-type stage-9 and stage-10 egg chambers, respectively. (D,E) The distribution of osk mRNA in an ovariole derived from a germ-line mosaic female. As seen in D, osk mRNA accumulates in the anterior pole of stage-9 mosaic egg chambers. Posterior pole accumulation of osk mRNA is not detected in mosaic stage 10 (E) egg chambers.