Question

Select the correct answer from each drop-down menu.

A mouse had a gene sequence of GTT coding for leucine, an amino acid.
mutation in this gene led to the formation of GTG. However, the amino acid formed was leucine, despite the mutation. This is a
mutation for the mouse.

Answer 1

The GTT to GTG mutation in the mouse's gene sequence, which still codes for leucine, is a silent mutation since it does not alter the amino acid sequence of the associated protein.

Step-by-step explanation:

The question is about a genetic mutation in a mouse involving a change in the gene sequence from GTT to GTG, both of which code for the amino acid leucine. Since the amino acid remains the same despite the mutation, this type of mutation is known as a silent mutation. Silent mutations do not change the amino acid sequence of a protein and therefore usually have no effect on the organism.

In contrast, a missense mutation changes one amino acid to another, potentially altering the protein's function, while a frameshift mutation changes the reading frame of the gene sequence, often leading to significant changes in the protein and possibly producing a nonfunctional protein or truncated protein due to a premature stop codon.