Genetic code refers to the combination of the genes (arranged in a specific sequence) that is the blueprint for who we can be. The genes are all independent units that can't do very much. But, when they are combined into a big sequence or code, they produce and indicate who we can be.
BUT, it is important to know that having a certain genetic code does not necessarily mean that is who we will become. Rather, there is a difference between all the genes we have (genotype) and the genes that are actually expressed (phenotype). Plus, environment is absolutely crucial in determining who we are and who we become.