Consider an mRNA strand that has a sequence of base pairs of GUU CUA ACU.%C2%A0 Suppose a substitution mutation occurred in the DNA, resulting in the last base in the first codon of the mRNA to be replaced by Cytosine. Using the codon chart below, a) identify which amino acid will now be formed, and b) explain why this mutation would not result in a phenotypic change. Your answer should be in 2-4 sentences.

Question

Consider an mRNA strand that has a sequence of base pairs of GUU CUA ACU.%C2%A0 Suppose a substitution mutation occurred in the DNA, resulting in the last base in the first codon of the mRNA to be replaced by Cytosine. Using the codon chart below, a) identify which amino acid will now be formed, and b) explain why this mutation would not result in a phenotypic change. Your answer should be in 2-4 sentences.

Your answer must include: Correct amino acid (abbreviation from chart) formed from new mRNA sequence Explanation on why this mutation would not have any effect on the phenotype of the organism Your answer should be 2-4 sentences in length. In an effort to combat plagiarism, answers longer than 5 sentences will not be considered.%C2%A0Answering concisely and to the point is evidence of your understanding of the topic. (2 points)

Answer 1

a) The new codon formed by the substitution mutation is GUC. According to the codon chart, this codon codes for the amino acid Valine (Val).

b) This mutation would not result in a phenotypic change because both the original codon (GUU) and the new codon (GUC) code for the same amino acid, Valine. Since the amino acid sequence remains unchanged, the resulting protein will also be unchanged, and therefore, there would be no observable effect on the phenotype of the organism.