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(D) The frequency of crossing over is directly proportional to the physical distance between genes on a chromosome.As the length of the chromosome inc

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(D) The frequency of crossing over is directly proportional to the physical distance between genes on a chromosome.As the length of the chromosome increases,the physical distance between genes located on that chromosome generally increases.Consequently,the probability of crossing over occurring between these genes increases.Since crossing over is the mechanism that leads to recombination,an increase in crossing over frequency directly leads to an increase in the frequency of recombination.Therefore,both crossing over and recombination increase with the length of the chromosome.

As the length of the chromosome increases in an organism,which of the following increases?

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