Biology

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22-23_Austin HS_CSA_G9-10-11-12-HS_SCI_E_EnvSysFebExam [27 Items]

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Sickle-shaped red blood cells result from a mutation in the gene that codes for hemoglobin. This mutation results in sickle-cell anemia. A partial sequence of bases from a normal hemoglobin gene and a

sequence that results in sickle-cell anemia are shown below.

Normal hemoglobin. T-G-A-G-G-T-C-T-C-C-T-C

Sickle-cell hemoglobin: T-G-A-G-G-T-C-A-C-C-T.C

What type of mutation is depicted in this sequence?

A. • Frameshitt

B. Deletion

C G Insertion

D. Substitution

Answer

D. Substitution

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The mutation depicted in the sequence is a substitution, which is when one base is replaced with another. In this case, the normal hemoglobin gene has...