Question

these four dna sequences are all sections of the vertebrate insulin gene. click on the two species that are the most closely related. hint: ignore the shaded columns in which all the nucleotides are the same.

Explanation:

Step1: Compare non - shaded nucleotides

Compare the non - shaded nucleotide differences between the four sequences.

Step2: Identify closest match

The sequences with the fewest non - shaded nucleotide differences are most closely related.

Answer:

(Without specific labels for the sequences, unable to give exact answer. But the method is to find the two with least non - shaded differences.)