If a gene undergoes duplication and one of the duplicated copy is mutated to render unexpressed protein. What will be the effect on phenotype?

Q. If a gene undergoes duplication and one of the duplicated copy is mutated to render unexpressed protein. What will be the effect on phenotype?

A.            Mutant phenotype

B.            Normal phenotype

C.            Expression of the mutant gene is less than that would occur if both copy active

D.            The gene not expressed at all

Answer: Normal phenotype