Below Are Short Fragments of DNA Sequences from Two Yeast

question 217

Multiple Choice

Below are short fragments of DNA sequences from two yeast strains (A and B) , which have been diverging from each other, as well as a short fragment from their common ancestor (C) . Yeast A: TGACTGCAAACATCCTAG
Yeast B: TGCCTGGACACATCGAAG
Yeast C: TGCCTGGAAACCTCCTAG
Lacking information from the common ancestor, what would you conclude is the minimum number of evolutionary changes occurring between strains A and B?

• A) three
• B) four
• C) five
• D) six
• E) seven

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