Consider the following two template DNA sequences: Sequence A: 3′-GGCACGTACCCTGCACCCTTTAACTTT 5′ Sequence B: 3′-GGCACGTACCCTGCAACCATTTAACTTT-5′ What type of mutations are present in sequence B, compared to sequence A?

Consider the following two template DNA sequences:
Sequence A: 3′-GGCACGTACCCTGCACCCTTTAACTTT 5′
Sequence B: 3′-GGCACGTACCCTGCAACCATTTAACTTT-5′
What type of mutations are present in sequence B, compared to sequence A?

Answer

• Insertion mutation
  Explanation:
  Insertion occurs when DNA sequence is changed by addition of one or more bases. This changes the sequence of DNA. There is an additional base A on sequence B, which is not present on sequence A.
  Sequence A: 3′-GGCACGTACCCTGCACCCTTTAACTTT 5′
  Sequence B: 3′-GGCACGTACCCTGCAACCATTTAACTTT-5′