Question

the DNA sequence reads ACGTTCATT before a mutation occurs. after the mutation, the DNA sequence reads ATCGTTCATT. which type of mutation occurred

Answer 1

addition, you added an extra T between the first A and C

Answer 2

Answer : The correct answer is -

Insertion mutation.

An insertion mutation can be described as a permanent change in the genetic material (DNA sequence) due to the addition of one or more nucleotides. It can result in alteration of protein (due to the change in the reading frame of DNA) , which may cause diseased condition.

In the given question, there is addition/insertion of T (thymine) at the second place in the original DNA sequence-

Original DNA sequence -

ACGTTCATT

Mutated DNA sequence - ATCGTTCATT

Thus, it is an insertion mutation.