How has gene duplication played a critical role in evolution?
a) It produces redundant copies of existing genes, which are then free to mutate and adopt new functions.
b) It almost always introduces immediate benefits for the organism.
c) It increases the amount of DNA in the genome.
d) It increases the number of pseudogenes in the genome.
e) It increases the likelihood of viral infection in cells.
Answer: a) It produces redundant copies of existing genes, which are then free to mutate and adopt new functions.
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