Final answer:
Option A, a substitution that results in a codon coding for the same amino acid (a silent mutation), would not change the resulting amino acid sequence, unlike deletions or inversions which are likely to result in frameshift mutations.
Step-by-step explanation:
The question asks which mutation in a codon sequence would not change the resulting amino acid sequence. Understanding the nature of different mutations can help answer this. For instance, silent mutations occur when the change in the nucleotide sequence does not affect the amino acid sequence due to the redundancy of the genetic code. An example of this would be a substitution that changes a codon to another codon that codes for the same amino acid. Referring to the options provided, option A (Substitution of UUG for codon 1 C Substitution of CAA for codon 6) may not change the resulting amino acid if the substituted codons code for the same amino acids as the original ones due to the degeneracy of the genetic code. In contrast, option B (Deletion of codon 1) and option D (Inversion of codon 8) are likely to cause a change in the amino acid sequence because they affect the reading frame (a frameshift mutation) or the sequence context. Based on information provided, a silent mutation (option A, if it results in a synonymous codon) does not result in a change in the amino acid sequence, while deletions (option B) and inversions (option D) can alter the protein drastically.