In many organisms, mutations that replace one pyrimidine with another, or one purine with another, are more frequent than mutations that replace a pyrimidine with a purine or vice versa. What does this finding imply about the accuracy of the statement "mutations are random."

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Quizplus · Accepted Answer

The finding implies that mutations are not entirely random in the sense of occurring with equal probability; rather, they are biased towards certain types of changes, such as transitions over transversions.

In Many Organisms, Mutations That Replace One Pyrimidine with Another