design principles of development

a work in progress

The French flag: reading position from a gradient
Making boundaries sharp
Remembering a decision
Lateral inhibition: making neighbours different
Self-organised patterning: making spots and stripes
Wavelength and tissue growth
Scaling: keeping proportions as size changes
Developmental clocks and waves
From pattern to shape
Feedback between shape and signalling
Knowing when to stop growing
Robustness and regeneration