inspired by the prgramme What makes us human?

It has long been a puzzle as to what caused the, in evolutionary terms, very rapid development of the cerebral cortex, which seems to have started 6 million years ago in our distant ancestors. (Human brains relative to the size of the body are huge, 3 times the size of a chimps brain). This rapid evolution of the brain allowed our ancestors and eventually ourselves to dominate our environment, through, amongst other things, the application of technology and it is also the reason why humans have an infinite ability to be creative/destructive.
Recently scientists have discovered a gene sequence which seems to play a significant role in giving humans their unique brain capacity. This sequence has gone through an amazing amount of evolution in the realitively short period of 6 million years. As an example, chickens & chimps (seperated by hundreds of millions of evolutionary years) share identical versions of this sequence, apart from two base pairs but humans & chimps have differences in 18 base pairs and we are only seperarated by six million years.
If this gene sequence is responsible for our very large brain capacity, how will we use the knowledge? Could this gene sequence and a few others like it be all that seperates us, all that it is that makes us human? Does this genetic inheritence manisfest itself in our potential to transcend our own biology? Am i talking utter bollocks?