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Beta-thalassemia is a blood disorder that reduces the production of hemoglobin, the oxygen carrying protein found in red blood cells. One form of Beta-thalassemia has been traced to an insertion mutation. Which of these shows an example of an insertion mutation?

Image displaying part of a chromosome that undergoes a mutation. The genes that make up the original chromosome are labeled RSTUV-XYZ. The genes that make up the mutated chromosome are labeled STUV-XY.

Image displaying part of a chromosome that undergoes a mutation. The genes that make up the original chromosome are labeled RSTUV-XYZ. The genes that make up the mutated chromosome are labeled KLRSTUV-XYZ.

Image displaying part of a chromosome that undergoes a mutation. The genes that make up the original chromosome are labeled RSTUV-XYZ. The genes that make up the mutated chromosome are labeled RSTUUV-XYZ.

Image displaying part of a chromosome that undergoes a mutation. The genes that make up the original chromosome are labeled RSTUV-XYZ. The genes that make up the mutated chromosome are labeled RUTSV-XYZ.