When the mathematical laws of probability are applied to the known facts of biology, the odds against the incredible, organized complexity of our biological world evolving through blind chance, plus time, are so astronomical in size that, for all practical purposes, evolution is mathematically impossible. In fact, the more we discover about the incredibly intricate, organized complexity of the biological world which exists at the molecular level, the more amazing it is that the evolutionist can actually believe it is all a product of pure blind chance over time. The "intelligent design" model, based upon a Divine Creator, makes much more sense
The genetic code in any given living cell provides extremely detailed instructions to that cell concerning its inherited characteristics and attributes, so it will allow only a limited amount of change and variation to occur without inducing sterilization or death. Accordingly, the genetic code will not allow, under any circumstances, the drastic changes and continuous mutations demanded by the theory of evolution.
Moreover, there is no evidence of gradually-changing DNA codes in nature that would allow periodic mutations to occur which would gradually transform a given type of organism, over long periods of time, into a completely different type of organism. Instead, organisms can mutate only so much before insurmountable DNA limits are reached. That is what the evidence demonstrates. Therefore, as noted previously, you will never see a mouse mutate into an elephant no matter how much time you allow for the alleged evolutionary process to occur. So, even though limited mutations occur in organisms, it is impossible for drastic or unlimited mutations, i.e., evolution, to occur.