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Which sequences among these will have a preference for frame shift?

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Which sequences among these will have a preference for frame shift?

(a) TTTTTTTTTTTTTTT

(b) AUGATTCT

(c) CATGCATGCATG

(d) AUGCTGTCGUA

The question was posed to me in final exam.

Question is taken from DNA Mutation in section DNA Mutation, DNA Repair, Transposable Elements of Cytogenetics

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The correct option is (a) TTTTTTTTTTTTTTT

For explanation: Repetitive sequences have a greater chance of frame shift mutation due to polymerase error. The polymerase tends to slide through these same sequences as even the base pairing is not much affected if it does so.

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