Figure 9-17 shows the nucleotide sequence from a protein-coding region of a gene in humans, chimpanzees, and gorillas and the protein sequence produced from this gene.The seventeen amino acids encoded by this DNA are numbered below.The two codons that are not conserved in all three species have been boxed.These two codons code for amino acids 3 and 15. Figure 9-17
Which of these statements is consistent with these sequence-comparison data?

Question

Figure 9-17 shows the nucleotide sequence from a protein-coding region of a gene in humans, chimpanzees, and gorillas and the protein sequence produced from this gene.The seventeen amino acids encoded by this DNA are numbered below.The two codons that are not conserved in all three species have been boxed.These two codons code for amino acids 3 and 15.  Figure 9-17
Which of these statements is consistent with these sequence-comparison data?

Quizplus · Accepted Answer

The two boxed codons indicate that there are differences in the nucleotide sequence for amino acids 3 and 15 among the three species. This suggests that the DNA coding for amino acid 15 has diverged in the chimp since the last common ancestor with humans and gorillas. This option is consistent with the sequence comparison data. Option A cannot be determined from the given data, and option B is not necessarily true just because the sequences are similar. Option D is not supported by the given data.

Figure 9-17 Shows the Nucleotide Sequence from a Protein-Coding Region