Solution

ID: past-exam-of-the-mathematics-course-of-the-university-of-cambridge/2001/iii/paper-29/6/i/solution

The recombination fraction is the probability that a transmitted gamete is recombinant between the two loci in the ordinary two-locus genetic linkage model. Its conventional range is
Zero corresponds to complete linkage and to independent assortment. Multiple physical crossovers can restore parental phase, so the recombination fraction is not the expected number of crossovers or an unrestricted crossover probability.

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