Question
Normal DNA Sequence: CAC GTG GAC TGA GGA CTT CTC Mutated DNA Sequence: CAC GTG GAC TGA GGA CAT CTC Which type of mutation is this? A Deletion C (OB Insertion C Inversion D Substitution
Answer
4.3
(232 Votes)
Terence
Veteran · Tutor for 12 years
Answer
The type of mutation in this case is 'D. Substitution'.
Explanation
## Step 1First, we need to compare the normal DNA sequence with the mutated DNA sequence. The normal DNA sequence is: CAC GTG GAC TGA GGA CTT CTC. The mutated DNA sequence is: CAC GTG GAC TGA GGA CAT CTC.## Step 2We can see that the last nucleotide in the normal sequence, which is 'TT', has changed to 'AT' in the mutated sequence. ## Step 3This type of mutation is called a "substitution". A substitution mutation occurs when a single nucleotide, or "base", changes. This is different from a deletion or insertion mutation, which involve the removal or addition of nucleotides, and an inversion mutation, which involves the reversal of the sequence of nucleotides.