A mutation in a plant's cell changes the gene that codes for a certain protein, and as a result the cell can no longer make the protein. The gene sequences before and after the mutation are shown in the following table.

Question

Sequence before the mutation: A–T–T–A–T–C–A–T–A
Sequence after the mutation: A–T–T–T–A–G–A–T–C–A–T–A

What kind of mutation is shown in the table?
A.
deletion
B.
insertion
C.
frameshift
D.
substitution

Answer 1

C. frameshift

Explanation: The mutation in the table results in an insertion of one extra base (G) between the fifth and sixth bases in the sequence. This causes a shift in the reading frame of the gene, leading to a frameshift mutation. This type of mutation can have significant effects on the resulting protein because it changes all of the amino acids after the mutation site.