When comparing DNA sequences of similar genes for proteins in related species, you see that some of the sequences are longer in one species compared to the other. Which of the following would MOST likely represent the extra number of bases that you would see?

Question

Quizplus · Accepted Answer

The extra number of bases is most likely to be a multiple of 3, as DNA sequences are read in codons (groups of three nucleotides) during translation to form proteins. This ensures that the extra bases can be translated into amino acids without disrupting the reading frame of the gene. Among the given options, 21 is the only number that is a multiple of 3.

When Comparing DNA Sequences of Similar Genes for Proteins in Related