Fig. 9. Asymmetric mitoses of primary nf and ns blast cells: spindle dynamics. Time-lapse fluorescence video micrographs of primary blast cells (cl.ag. 40-45 hours) descended from an N teloblast injected with tau::GFP mRNA. The elapsed time (minutes) is indicated in the top right-hand corner of each panel. (A) Dividing ns cell. (B) Dividing nf cell. (C) A fortuitous specimen in which an ns and a younger nf cell (separated by a two-cell nf clone and an undivided ns cell) were dividing simultaneously. Broken outlines indicate the cell borders; arrows indicate the spindle midbody. Scale bar: 10 µm.