Question: (1 point) A DNA sequence can be represented as a string of the letters ACTG (short for adenine, cytosine, guanine, and thymine). (a) How many

(1 point) A DNA sequence can be represented as a string of the letters ACTG (short for adenine, cytosine, guanine, and thymine).

(a) How many DNA sequences are exactly 22 letters long?

(b) Given a DNA sequence of length 22, how many single letter mutations are possible?

(c) Given a DNA sequence of length 22, how many double letter mutations are possible?

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