Question
Most mutations are thought to be deleterious. Why, then, is it reasonable to state that mutations are essential to the evolution-ary process?
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Mutations are changes in the genetic material of an organism, which can occur randomly and spontaneously during DNA replication, or due to external factors such as radiation or chemicals. Show more…
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Given that mutations are almost always neutral or harmful, why are mutations nevertheless essential to evolution? Explain your answer.
With regard to mutations, what is meant by the terms "harmful," "beneficial," and "neutral"? Why it is sometimes an oversimplification to consider a mutation as harmful, beneficial, or neutral?
Random mutations only very rarely result in changes in a protein that improve its usefulness for the cell, yet useful mutations are selected in evolution. Because these changes are so rare, for each useful mutation there are innumerable mutations that lead to either no improvement or inactive proteins. Why, then, do cells not contain millions of proteins that are of no use?
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