You Are Using a Molecular Clock to Investigate How Long

question 34

Multiple Choice

You are using a molecular clock to investigate how long ago two taxa diverged.In the sequence of mitochondrial DNA you are using,in one location an arginine mutated to a thymine;thousands of years later,it mutated from thymine back to arginine.What effect will this reversion to arginine have on your estimate of the time of divergence?

• A)It will have no effect.
• B)You will slightly overestimate the time since the two taxa diverged.
• C)You will slightly underestimate the time since the two taxa diverged.

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Forward Acquisition

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