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A silent mutation is most likely to result from (A) Substitution of the first base of a codon

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A silent mutation is most likely to result from 

(A) Substitution of the first base of a codon 

(B) Substitution of the third base of a codon 

(C) Conversion of a nonsense codon into a sense codon 

(D) Conversion of a sense codon into a nonsense codon

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1 Answer

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(B) Substitution of the third base of a codon 

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