Mathematics and development (from Developmental Biology)

I have an free app on my i pod touch that generates fractals in response to tilting movements as well as by touch. A while ago before biologists actually knew how development worked they came up with all sorts of elegant mathematical models of how they wished development worked. It turns out that actually the whole thing is a very complicated mess with important things happening both upstream and down stream of genes that everything is made of modified and ... Car Cars Bicycle