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