Sequences for the types of hemoglobin are shown. CCT GAG GAG
Sequence for wild-type hemoglobin
CCT GTG GAG
Sequence for sickle-cell hemoglobin
Sickle-cell anemia is caused by a mutation of one nucleotide in a gene. The type of mutation that causes sickle-cell anemia is known as
A) a frame-shift mutation
B) an insertion mutation
С) an inversion mutation.
D) a point mutation