Quote Originally Posted by leo9 View Post
My favourite example of the complicated link between genes and growth is tortoiseshell cats. (The kind with random blotches of colour.) When they've cloned this breed, they get kittens that all look different. Apparently the tortoiseshell genes say "make blotches," but where, and what colour, is determined by something else - maybe an internal randomiser, maybe microscopic chance influences in the womb.
I saw a very interesting program about what controls genes - gene's genes if you will - and it was fascinating. I believe we have only started to understand genes. The genes of genes among other things apparently shut them off an on, but also influence other things.

Variety is good for a species, particularly a species like ours that specialises in everything. Contrary to the alpha-male theory of evolution, there is not one "fittest" type to which the whole species is trying to evolve: what type is fittest changes all the time.
Yes, otherwise how would there be any evolution? I believe it means on-going changes and adaptions.