Fig. 5.

Transition from oscillator-growth to reaction-diffusion pattern formation. a standard oscillation-growth scenario, as seen in Fig. 1. b embryo parameters are changed and the oscillator-growth system is on the border of a transition to a reaction-diffusion based pattern-forming system in the mature (upper, right) part. c parameter transition is complete. The mature part of the embryo now forms a repetitive pattern by a R-D mechanism, but forcing from the oscillator in the posterior growth zone yields the same pattern as before the transition. Thus, the “mutant” embryo may survive this transition to another pattern-forming mechanism, which may then be exploited by evolution as a basis for a simultaneous all-or-none stripe mechanism. Reproduced from [58]