Now consider a single base mutation in a codon for leucine that creates a codon

ID: 66448 • Letter: N

Question

Now consider a single base mutation in a codon for leucine that creates a codon for phenylalanine. A true reversion changes the phenylalanine codon back to a codon for leucine. Which of the following leucine codon(s) could be mutated once to form a phenylalanine codon, and then mutated at a second site to restore a leucine codon? Select all that apply. (Note that two different positions in the codon must be mutated.) Select all that apply. (Note that two different positions in the codon must be mutated.)

CUU

CUC

CUA

UUG

UUA

CUG

none of these codons

Explanation / Answer

Answer:

CUU

CUC

UUG

UUA

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Now consider a single base mutation in a codon for leucine that creates a codon

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