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Originally Posted by steve12553
Mutation is following along the lines of something normally caused by genetics but deviating in an individual. This crab may be doing something that all crabs can do but normally don't. If you or I grow an extra hand that would be a mutation because we don't have the ability to grow a hand once we lost one. Our genes won't let us. The crab has the ability to grow a replacement claw but grew it when it hadn't lost one. That seems to me to merely be a misfire, like a dog shedding in the winter.
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A frame shift error in DNA replication, like this,
is a mutation. We are probably already dealing with some mutations in humans that no one can see or that are being diagnosed, like Autism, as illnesses or disabilities.
If the frame shift error continues and replicates itself in a new generation on a regular basis, it becomes a characteristic of a
new species.