In all probability that will be the outcome. The odds against anything else happening are so small as to be non-existent. Yet evolution postulates that it happened trillions of times as countless minor or major alterations in various complex systems among millions of animals.
My point is that it's highly improbable that your experiment would work. That's not proof that evolution did not occur, however. It's also highly improbable that I will win the Powerball drawing if I buy a ticket. It's not proof that I won't win, however.