Xenbase Image ID: 133133

Fig. 2. Histograms of the frequency distributions of clone sizes for precursors labelled at the optic vesicle (St 22) and the optic cup (St 30) stages. Precursors labelled at St 30 (top histogram) produce more small clones and fewer large clones than do precursors labelled at St 22 (bottom histogram). This difference between St 30 and St 22 is not surprising, because precursors at St 30 have less time to proliferate before the end of the birthdate period (at St 37). Precursors at both stages produce a relatively wide range of clone sizes; this wide range suggests that the regulation of proliferation might involve a stochastic process. Image published in: Wetts R and Fraser SE (1991) Copyright © 1991. Image reproduced with permission of the Publisher and the copyright holder. This is an Open Access article distributed under the terms of the Creative Commons Attribution License. Larger Image Printer Friendly View

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