Genes abc and def have a high average cotransduction frequency. Genes abc and xyz have a very low average cotransduction frequency. What is the best explanation for this difference?
A. Both genes code for gene products that are necessary for viral replication.
B. The genes abc and def must share a higher degree of sequence similarity.
C. The genes abc and def are much closer to each other on the chromosome.
D. Both genes have a high affinity for the viral binding sites.
Answer: C
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