casp-3aMO1 and casp-9MO1 morphants do not have increased apoptosis, and RGC axons follow normal trajectories to the optic tectum. (A–F) Lateral views of TUNEL labeling of WT (A), coMO (B), HA14-1 (activates Caspase-3 by the inhibition of Bcl-2, positive control; C), control (vehicle, Milli-Q water; D), casp-3aMO1 (E), and casp-9MO1 (F) at 80 hpf. No increase in apoptosis is observed in the morphants. (G–J) Lateral views of WT (G), coMO (H), casp-3aMO1 (I), and casp-9MO1 (J) morphants at 80 hpf, illustrating the pathway taken by one or a few YFP-Rab3–labeled RGCs from the optic chiasm to the tectum. Those morphant RGC axons that reach the tectum follow a normal trajectory. n = 5 embryos analyzed per condition. Tec, tectum. Anterior is left, and dorsal is up. Bar, 100 μm.
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