Transcript:

The human genome has 2.9 billion base pairs. And each base pair can be coded by two bits of information. Which means the human genome is carrying 725 megabytes of information.

Now, the difference in the DNA between a human and a chimpanzee, for example, is 10 megabytes of information. 10 MB of 725. But that small difference is very important.

Why? Because if you take a chimpanzee, a baby chimpanzee, and a human baby and bring them up in the same house, the chimpanzee will never ever speak like a human baby. The chimpanzee never behaves exactly like a human.

That 10 MB difference is critical. Small differences in genes make a huge difference in behaviour.