Rhodopsin is a light-sensitive receptor protein found in rod cells of the retina. Rhodopsin helps transmit visual signals to the brain under low-light conditions. The rhodopsin protein is encoded by the RHO gene. The structure of the RHO gene is shown in the diagram below. In the diagram, rectangles represent exons and horizontal lines represent introns.Which of the following RHO gene mutations would most likely affect a person’s ability to see under low-light conditions?Multiple choice answers:A. A single base-pair substitution at Site 3 that changes a serine-encoding codon (AGC) to an arginine-encoding codon (AGA)B. A single base-pair insertion at Site 1 that adds a "G-C" nucleotide pair to the gene sequenceC. A two base-pair deletion at Site 2 that removes two "A-T" nucleotide pairs from the gene sequenceD. A single base-pair substitution at Site 4 that changes one proline-encoding codon (CCC) to another (CCA)
