Aac –gcc – gtc –cgc – tag
identify the mrna codons that would be produced using this dna as a template. [1]
dna base sequence: aac gcc gtc cgc tag
mrna codons:

UUG CGG CAG GCG AUG

In RNA, U always pair with A; G always pair with C.
Therefore, when you see mRNA, you have to convert the anti-codons/condons from DNA to mRNA. When there is a T, it will be converted to A. A would be to U, U would be to A, G would be to C and C would be to G.

Frameshift mutations are due to either insertions or deletions of nucleotides

Explanation: Frameshift mutations result in abnormal protein products with an incorrect amino acid sequence that can be either longer or shorter than the normal protein.