Answer :
The A, B, C, and D genes are all located within the same chromosome. The frequencies of recombination are as follows: 19% for A-B, 14% for B-C, 5% for A-C, 2% for B-D, 21% for A-D, and 16% for C-D.
The incidence of recombination between genes A and B is 10%, and between genes B and C is 20%. Recombination frequencies are frequently converted into cM by geneticists because the percent recombination frequency and the cM map distance are roughly equivalent. For instance, two loci are considered to be 25cM separated on a chromosome if their recombination probability is 25%. Therefore, the highest recurrence of the problem that can be observed is 50%, which is a sign of loci that are on different chromosomes or that are spread out widely within the same chromosome. The chance of recombination is 50% when the genes are distant from one another or on different chromosomes. In this instance, the two loci's allele inheritance is independent.
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