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anonymous

  • 4 years ago

A molecule that can be used as a molecular clock has a neutral mutation rate of one mutation per 5 million years. How many years ago did two species share a common ancestor if the molecules found in these two species differ by a total of eight mutations? Answer a) 1.5 million years b) 10 million years c) 20 million years d) 40 million years ( is it A? not sure)

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  1. blues
    • 4 years ago
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    I think it's D. It tells you that there is 1 mutation every 5 million years. So after 5 million years, there is one mutation. After 10 million years, there are two mutations. So after 40 million years, there will be 8 mutations.

  2. blues
    • 4 years ago
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    Clear?

  3. anonymous
    • 4 years ago
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    yes now I understand !

  4. anonymous
    • one year ago
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    It's actually 20 million, because there are two species

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