Consider an mRNA strand that has a sequence of base pairs of GUU CUA ACU. 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, b) identify whether or not there will be a phenotypic change, and a brief explanation. Your answer should be in 1 sentnce

Question

Consider an mRNA strand that has a sequence of base pairs of GUU CUA ACU.  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, b) identify whether or not there will be a phenotypic change, and a brief explanation. Your answer should be in 1 sentnce

GPT-4o mini · Answer

a) The mRNA sequence changes from GUU to GUC, resulting in the amino acid Valine being formed; b) There will be no phenotypic change because both GUU and GUC code for Valine, making it a silent mutation.