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 25 letters long? (b) Given a DNA sequence of length 25, how many single letter mutations are possible? (c) Given a DNA sequence of length 25, how many double letter mutations are possible?
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 25 letters long? (b) Given a DNA sequence of length 25, how many single letter mutations are possible? (c) Given a DNA sequence of length 25, how many double letter mutations are possible?
A First Course in Probability (10th Edition)
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ISBN:9780134753119
Author:Sheldon Ross
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Chapter1: Combinatorial Analysis
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Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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
Transcribed Image Text: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 25 letters long?
(b) Given a DNA sequence of length 25, how many single letter mutations are possible?
(c) Given a DNA sequence of length 25, how many double letter mutations are possible?
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VIEWStep 2: Calculating the number of many DNA sequences that are exactly 25 letters long
VIEWStep 3: Calculating Number of single mutations possible in DNA sequence of length 25
VIEWStep 4: Calculating Number of double mutations possible in DNA sequence of length 25
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