Will we ever be able to find out with each gene specifically does?
We are working on it! When we sequence the chromosome of organisms, we are pretty good at figuring out where genes start, when genes stop. When it comes to what they do, we mainly do it by comparison to other well understood genes, still some genes that "look" like others can sometimes be shown to have different unexpected functions. The other problem is that in bacteria a good third of the genes still have not been assigned a function. It is sometimes difficult when we have nothing with function to compare.
Answered By: Dr. Richard Sparling