I'm not sure if you could work out from a genome what the cell should look like - probably not. An important point is that cells are always born of other cells

I'm not sure if you could work out from a genome what the cell should look like - probably not. An important point is that cells are always born of other cells. In other words, a cell replicates by dividing itself, building the parts as it goes along. So there is never such a thing as a 'naked' genome in biology. There are things like viruses, that hijack cell machinery. There are sperm cells, that carry some DNA into an egg and use that. There is the DNA in mitochondria that rely on the host cell for some proteins. If you trace backwards, the genome and it's substrate (the cell) have co-evolved to work together. The existing cell acts as the template for the organisation of a new cell, while reading the genome for the structure of its parts. Of course, the genome contains information about when to make the parts, and how to regulate them.