A substitution of thymine to adenine in one DNA base sequence can cause a particular disorder in blood cells. When this occurs, the blood cell shape changes into
a crescent, rather than the normal round shape. The DNA sequence change is shown
below.
Normal: CTT
Mutated: CAT
Which statement BEST explains how the change in DNA leads to this disorder?
The mutation prevents the production of all proteins in the blood.
The mutation prevents the production of the protein.
The mutation causes extra proteins to be made by the cell.
The mutation causes a different amino acid at this location in the protein.