The fact that approximately 80% of the six codons that encode the amino acid leucine in yeast are UUG is an example of codon bias.

Question

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Codon bias refers to an unequal usage of synonymous codons that encode the same amino acid, which can occur due to various factors such as tRNA availability, GC content, and natural selection. In this case, the fact that UUG is used more frequently than other codons that also encode leucine in yeast indicates a codon bias towards UUG.

The Fact That Approximately 80% of the Six Codons That