FIGURE 6:
MR inheritance correlates with stem cell fate. (A) An example of an MR that is apparently pinched off from both sides upon GSC division in a Upd-expressing testis (nos-gal4>UAS-Upd). Green, Pav-GFP; red, Fas III and Add; blue, Vasa. The asterisk indicates hub cells. Bar, 10 μm. (B) The MR inheritance pattern in control vs. Upd-expressing testes. (C) An example of MR inherited by the cell that is displaced away from the niche (i.e., the cell at the position of the cystoblast; c587-gal4>UAS-Dpp, raised at 18°C, shifted to 29°C for 7 d). Arrowheads indicate the site of abscission. Note that Dpp expression only caused a mild increase in the GSC number under our experimental conditions. (D) The MR inheritance pattern in control vs. Dpp-expressing ovary. Only GSC-CB pairs in which the direction of MR inheritance was clear were scored.