Question

A mutation changes the original base sequence of DNA, GATAGCCG to a new sequence GGTAGCCG. What is the type of mutation?

• A. Transition
• B. Transversion
• C. Translocation
• D. Inversion

Answer 1

The correct option is A Transition

Transition, in genetics and molecular biology, refers to a point mutation that changes a purine nucleotide to another purine (A ↔ G), or a pyrimidine nucleotide to another pyrimidine (C ↔ T).

In the two sequences given in the question, A (adenine, a purine) at position 2 has been replaced with G (guanine, a purine).

So, the correct answer is 'Transition'.