Life most likely did not begin with DNA. It likely didn't even begin with RNA. Both are molecules that are more complex than can easily arise by chance. Life likely began as a relatively simple self-replicator. An auto-catalytic chemical reaction that makes more of itself from molecules present in the early oceans. We've produced self-replicating molecules in the lab and they exhibit both mutation and heredity. DNA and DNA were likely evolved later as more robust molecule for information storage.
The information in your genome comes from the environment. Mutation adds random noise to your genetic material. Usually this is useless or detrimental. Rarely it helps you survive just a little bit better. Natural selection removes the detrimental mutations, leaving behind information that helps you survive. We've watched this happen. God didn't make nylon-eating bacteria and he didn't turn lizards on an island into vegetarians.
The information in your genome comes from the environment. Mutation adds random noise to your genetic material. Usually this is useless or detrimental. Rarely it helps you survive just a little bit better. Natural selection removes the detrimental mutations, leaving behind information that helps you survive. We've watched this happen. God didn't make nylon-eating bacteria and he didn't turn lizards on an island into vegetarians.
