Question

A section of DNA from three species was sequenced and the sequences were compared. Which two species are most closely related? ​Why?

DNA Sequence:



A 5’-AATTCCGTCGCAA-3
3’-TTAAGGCAGCGTT-5’

B 5’-AATACCGTCGCAA-3’ 3’-TTATGGCAGCGTT-5’

C 5’-GAGTCTTTCGCAA-3’ 3’-CTCAGAAAGCGTT-5’

Answer 1

[AI-generated answer — Bot GPT 3.5]

Species A and Species B are most closely related. This is because their DNA sequences are the most similar, differing by only one base pair in the sequence (bolded in the sequences above). Species C, on the other hand, differs from both A and B by multiple base pairs in the sequence.