Okey, yeah, I think I see what you mean. It's not by pure chance alone that things evolve, there are some controlling factors too, like environmental selections, that on more that one occasion were the same and probably had similar effects on a species' evolution. I also think that certain things quite a lot of species have in common also have very similar if not the same DNA code. Take liquids like blood for example or skin tissue, even a heart or other organs and basic body cells resemble those of the animal kingdom quite a lot and thus also appear in the DNA as a familiar string of codes perhaps? If we are all related in one way or another, and from one time on, life began as one cell, it's not that strange to discover familiar DNA parts amongst a lot of species. If DNA is the information about how to grow/build and thus evolve, it's not that weird. Infact if a God placed all animals on this earth, then why did he gave them similar DNA?

Cheers