DNA is a programming device of cells: it contains all the information about the whole organism and the final and perfect execution of the program… much like a set of blueprints contain every aspect of a building, from walls through air conditioning, every part.
The DNA only controls the hardware of a human being: the software, most of it, comes from the environment, the culture, the decisions one has made.
We could say that the DNA provides the equipment, but it is still up to the individual user to use the equipment to its full potential or not.