Final answer:
Genetic mutations are like misprints in a book because they are random errors that can alter the DNA sequence of an organism.
Step-by-step explanation:
When someone says genetic mutations are like misprints in a book, they mean that mutations are random errors. Just like a misprint can alter the meaning of a sentence in a book, mutations can alter the DNA sequence of an organism. These mutations can happen spontaneously during DNA replication or be caused by external factors like radiation or chemicals.