What is the relationship between recombination frequency and the actual physical distance on a chromosome?
A. As physical distance increases, the recombination frequency increases in a linear fashion.
B. As physical distance increases, the recombination frequency first increases in a linear fashion, but gradually levels off to a frequency of 0.5.
C. As physical distance increases, the recombination frequency decreases in a linear fashion.
D. As physical distance increases, the recombination frequency first increases, but then decreases.
Answer: B
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