Chapter 18 Notes: The Interaction between Selection and Other Forces: Figure WN18.2 - The six ways in which UCG (coding for serine) can mutate so as to code for a different amino acid.

Figure WN18.2 - The six ways in which UCG (coding for serine) can mutate so as to code for a different amino acid.

Figure WN18.2. The six ways in which UCG (coding for serine) can mutate so as to code for a different amino acid. Changes in the third position do not affect the code, whereas any change at the first two positions leads to a different amino acid. The rates of mutation between codons connected by any of the arrows is µ/3, where µ is the rate of mutation per site. Note that there are six times as many ways of mutating away from the correct codon as there are of mutating back to it from a one-error mutant.

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