Gce Model Questions Vol1 2023 Biology Question 47
Practice objective / multiple choice question 47 from the 2023 Gce Model Questions Vol1 Biology examination.
DNA sequences of three related species X, Y and Z show the following pairwise percent differences: X-Y = 8 %, X-Z = 12 %, Y-Z = 10 %. Fossil evidence indicates that species X diverged from the common ancestor of Y and Z 4 million years ago. Assuming a constant molecular clock, estimate the time (in million years) at which Y and Z diverged from each other.
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This is Gce Model Questions Vol1 2023 Biology Question 47. It is one of the objective questions from the 2023 Gce Model Questions Vol1 Biology examination.
Difficulty level: Medium .
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