Bojan writes:
Since the genes from a mouse produced eyes of a fly, that shows that some basic general blueprint is preserved through vast time and many species.
I don't see how it shows any such thing. It shows that mouse genes will work in a fly - i.e. the basic mechanism of DNA is universal.
Using your blueprint analogy, the blueprint for a fly is made up of the same kinds of lines as the blueprint for a mouse - you can cut out a section of the mouse blueprint and paste it into the fly blueprint to make a Franken-fly.
You could use the same cut-and-paste technique with a fish blueprint but that says nothing about the natural evolution of a fish.