Fig. 8. Ectopic eye development correlated with displacement of the D cell division plane. (A) Histograms showing 1d volume in embryos that were subsequently assayed for eye development. 1d cells were measured in situ following compression at third cleavage (compressed embryos) or ablation of neighboring cells during the mid four-cell stage (partial embryos). Black boxes represent individuals that developed one or more eyes; light-gray boxes represent eyeless individuals. Normal micromere volumes (data from Fig. 6; dark-gray boxes) are shown on the same scale for comparison. (B) A three-eyed larva that developed after compression during third cleavage. Scale bar: 100 µm.