The Molecular Clock through evolution is determined by the rate of mutation and the degree of purifying selection. The Clock runs slower in what parts of the genome? Exons Polyadenylation sequences Introns 5' untranslated regions Long-repetitive sequences
Question
The Molecular Clock through evolution is determined by the rate of mutation and the degree of purifying selection. The Clock runs slower in what parts of the genome? Exons Polyadenylation sequences Introns 5' untranslated regions Long-repetitive sequences
Solution
The Molecular Clock runs slower in the parts of the genome that are under strong purifying selection. This is because these regions are less likely to accumulate mutations over time. Therefore, the correct answer is Exons. Exons are the coding regions of the genome that are translated into proteins. Any mutations in these regions are more likely to have a significant effect on the organism, and therefore, are more likely to be removed by purifying selection.
Similar Questions
A(n) clock uses differences in DNA to determine when organisms diverged from a common ancestor.
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Why is the use of a molecular clock controversial?Multiple choice question.It is only useful in some species.It assumes that rates of evolution are different for different genes.It assumes that DNA divergence rates are constant over time.It does not incorporate information from the fossil record about the timing of evolutionary events.
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