If the recombination frequency between gene A and B is 10 out of 100 offspring, gene A and C is 30 out of 100 offspring, and gene B and C is 40 out of 100 offspring, what is the location of these genes in relation to each other on a chromosome?

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Quizplus · Accepted Answer

The recombination frequency between genes is indicative of their physical distance on a chromosome. The smaller the recombination frequency, the closer the genes are to each other. Here, genes A and B have the smallest recombination frequency (10%), indicating they are closest to each other. Gene C has a higher recombination frequency with both A (30%) and B (40%), suggesting it is farther from both. Therefore, C is on one end, and A and B are closer together on the opposite end. This configuration allows for either CAB or BAC as the correct gene order.

If the Recombination Frequency Between Gene a and B Is