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Answer :
Final answer:
Organisms with few similarities in amino acid sequences are less related because these sequences reflect underlying genetic relatedness. DNA sequence homology is a strong indicator of evolutionary relationships, indicating a recent common ancestor. However, similarities can sometimes result from convergent evolution instead of shared ancestry.
Explanation:
If 2 organisms do not have many of the same amino acid sequences, they would be less related to each other. Amino acid sequences in proteins are determined by the nucleotide sequences in DNA, and similarities in these sequences between organisms are used as indicators of relatedness. Therefore, when two organisms have significantly different amino acid sequences, it is likely that they do not share a close evolutionary relationship. This is because over time, evolutionary processes result in changes to the sequences, and more closely related organisms have had less time to accumulate these changes.
The degree of genetic similarities can be a strong indicator of evolutionary relationships. When assessing whether two organisms are closely related, scientists often compare their DNA sequences. If these sequences are highly homologous, it suggests a recent common ancestor, and thus, a close relationship. Conversely, organisms that appear closely related may not actually be if their DNA sequences are quite different. It's important to note, however, that some organisms may have similar features due to convergent evolution rather than shared ancestry, which can complicate this assessment.
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