Genetic Code   Consider a gene that is mutated, generating the change in the mRNA shown below. (Assume that this is a piece of mRNA from within the middle of the protein-coding sequence.) mRNA from original gene:              5’-CCUGGCUAUUGC-3’ mRNA from mutated gene:            5’-CCUGCGCUAUUGC-3’ What type of mutation is this?单项选择题

题目图片
A

A silent mutation

B

A deletion mutation

C

A nonsense mutation

D

A missense mutation

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类似问题

T/F One DNA nucleotide change results in one amino acid change. This is called "missense mutation"

Sickle cell disease is caused by which type of mutation?

Sickle-cell anemia is associated with a mutation in the gene encoding the beta subunit of hemoglobin that results in a change from glutamic acid to valine at position 6. All other amino acids are identical to a normal hemoglobin molecule. Based on the information above, which of the following mutations is the most likely cause of sickle-cell anemia?

Sickle-cell anemia is an inherited blood disorder in which one of the hemoglobin subunits is replaced with a different form of hemoglobin. Partial DNA sequences of the HBB gene for normal hemoglobin and for sickle-cell hemoglobin are shown in Figure 1. Partial sequence for normal hemoglobin: Partial sequence for sickle-cell hemoglobin: Figure 1. Comparison of partial DNA sequences for normal hemoglobin and hemoglobin with a sickle-cell mutation Which of the following best describes the type of mutation shown in Figure 1 that leads to sickle-cell anemia?

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