Consider a locus in which the fitness of AA and Aa genotypes are greater than the fitness of aa genotype. In addition, this locus experiences forward mutation from the A allele to a allele. At this locus, the A allele:

a.
will always go to fixation.

b.
will always be lost.

c.
will never go to fixation.

d.
will never change.

e.
None of the above.

Will never go to fixation.

Explanation:

Mutation is the sudden, heritable change in the genetic sequence of the organisms. The mutation might cause the particular disease in the organisms.

The  gene fitness leads to the increase in the gene frequency in the upcoming generations. The gene will fix in the population when their i no selection and no mutation. Since, the information given in the question states that mutation is acting, so the A allele will never fix in the population.

Thus, the answer is option (c).

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