- Gene ---(mutation)---> New alleles.
- The alleles are responsible for the phenotype.
- Impact could be:
1. Beneficial [e.g. improve the efficiency of an enzyme]
2.Neutral ( no effect ) [at the point in time has no effect although the neutrality may not last forever and in time, with environmental change, may become harmful or beneficial]
3. Harmful [e.g. the mutation leads to production of an enzyme with doesn't work - non-functional]
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