We do share a common ape ancestor with chimpanzees. It lived between 8 and 6 million years ago. But humans and chimpanzees evolved differently from that same ancestor. The human genome has been sequenced, as well as the chimpanzee genome.
Humans have 23 pairs of chromosomes, while chimpanzees, gorillas, and orangutans have 24. As evolution is progressive process its occur in forward direction and evolution is a long term process that happen in all chimpanzees, not in a single one chimpanzee. Its take many generation. So, evolution is not happening in today’s chimpanzees.