[<1/1,000,000th%]

Because they came into existence from the same or similar mechanism or process.

OK. What process would create apes, then a couple millions of years later, humans with similar genes?

[jwalsh07]

What process would create apes, then a couple millions of years later, humans with similar genes?

Dunno.

What process would create mice with human neurons?

[microgood]

OK. What process would create apes, then a couple millions of years later, humans with similar genes?

Assuming that your statement about the timing of apes and man is correct, I do not know. But it might be the same process that allowed creatures with arms and legs and brains to come into existence where they previously did not exist (of course I am just speculating here).