Suppose Three Sibling Species of Frogs Have the Following DNA

question 165

Multiple Choice

Suppose three sibling species of frogs have the following DNA sequences at a portion of a gene: Species 1: AGTCTAGATCGCGGTCG
Species 2: AGTCGATCGCGGACG
Species 3: TGTCTAGATCACGGTCG
Recall that the observed number of mutations can differ from the total number of actual substitutions that occurred in pairwise sequence comparisons.If we assume that a gap of any length is equivalent to three nucleotide substitutions, how many substitutions have occurred between Species 1 and Species 2?

• A) 1
• B) 2
• C) 3
• D) 4
• E) 5

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