Which region of a gene should have the highest rates of subs

Which region of a gene should have the highest rates of substitution? First position of a codon Second position of a codon Third position of a codon 5 c flanking regions 3 c untranslated region

Solution

Answer : The correct answer is C ( Third position of the codon). Since the base pairing rules occurs only for the first two bases of codon between tRNA and mRNA and the third base pairing is relaxed and that base pair is called wobble base pairs.