I read this statement and come up with the reverse sense than you do, probably because you used the word "blueprint." A blueprint is a model of economy; and blueprints are always designs. Living things arising in nature through evolution may do so according to a blueprint in precisely this sense. I don't think this possibility has been (perhaps cannot be) ruled out.
If you think of genes as a program, you cannot predict their outcome except by running the program. I like to think of this as acause/effect system in which causation flows backwards in time. Selection causes some programs to have a reproductive advantage.
Perhaps God, existing outside time, is the ultimate selector. ;^)
But within the constraints of a system that perceives time as change rather than a physical dimension, the design of living systems is impossible, because you cannot foresee the consequenses of changes to your program.