How do mutations impact genetic variation?

The random changes a mutation causes to an organisms genetic code causes either 1. A different protein to be produced or 2. none at all Mutations can either have a positive, negative or neutral (the vast majority) effect on the organism. (many times whether they are harmful or helpful depends on the environment.) When a mutation makes an organism better able to survive that organism is more likely to survive and pass the mutated gene onto the next generation.

The offspring will be blood type aa, bb, ab and oo or i