Fig. 6. Orientation of division is almost always within the plane of the ventricular zone. (A-C) Sequence from a time-lapse movie showing a dextran-labelled cell divide along the plane of the ventricular zone. Dorsal view with anterior to the top. Scale bars: 20 µm. (D-E) Sequence from a time-lapse movie illustrating a cell rounding up in the ventricular zone and undergoing mitosis (arrowheads). In this case cells are stained with the vital dye Bodipy 505/515. Dorsal view with anterior to the top. Scale bars: 20 µm.