Duplication of Vermillion eye colour gene leads to the expression of the mutant phenotype. Which of the following can lead to normal phenotype with this duplication present?

Q. Duplication of Vermillion eye colour gene leads to the expression of the mutant phenotype. Which of the following can lead to normal phenotype with this duplication present?

A.            Reverse tandem duplication

B.            Duplication of normal eye colour gene

C.            Deletion of both the Vermillion gene

D.            Translocation of Vermillion gene to another chromosome

Answer: Duplication of normal eye colour gene