Question

A mutation between a cytosine and a thymine is known as a ______________________________________. (Please fill in the blank using a one word answer, spelling counts).

Answer 1

Answer: Transition

Step-by-step explanation:

Transition is a kind of mutation that occurs when a purine base is substituted by another purine base (or a pyrimidine base by another pyrimidine base).

Therefore, since cytosine and thymine are both pyrimidine bases, the mutation is known as TRANSITION