Question

A mutation occurred in a section of DNA that is normally: AGCGTTACCGT resulting in the following base sequence: AGGCGTTACCGT.

What type of mutation occurred?
O a nonsense mutation
O a silent mutation
O a point mutation
O frameshift mutation
O a missense mutation"

Answer 1

The mutation that adds an extra base to the DNA sequence is a frameshift mutation, which alters the reading frame of the DNA sequence and can change the entire amino acid sequence of the protein it encodes.

Step-by-step explanation:

Type of Mutation

The mutation described, where an extra base is added, resulting in the sequence AGCGTTACCGT changing to AGGCGTTACCGT, is known as a frameshift mutation. A frameshift mutation typically occurs when one or more nucleotides are inserted into or deleted from the DNA sequence. This changes the way the sequence is read in sets of three nucleotides, or codons, which can significantly alter the amino acid sequence of a protein. This type of mutation can have serious effects because it changes the frame from which nucleotides are read, likely resulting in a completely different amino acid sequence downstream of the mutation site.

A point mutation, on the other hand, affects only a single nucleotide and would not cause a shift in the reading frame like insertion. In the case described, a point mutation would involve a change in only one base pair without the addition of a new base into the sequence.