Figure 4.

Asymmetric Divisions: Unequal in Both Cell Size and Fate.

The ratio of daughter cell size in divisions with an asymmetric fate (MMCs; circles) and with a symmetric fate (divisions of smaller cells that produced two pavement cells; squares). No divisions that were asymmetric in fate had daughter cells of equal size, and no divisions that were symmetric in fate had daughter cells differing in size by >30%. Measurements of daughter cell size were made from dental resin sequences of 300 divisions that were known to be asymmetric in fate and of 100 that were symmetric in fate. Curves represent best fit.