Three genes, A, B, and C, are all on the same chromosome. The recombination rate between A and B is 24 cM, the recombination rate between A and C is 14 cM, and the recombination rate between B and C is 38 cM. Can you predict the order of the three genes?

Question

Biology

Paityn Mueller

25 January, 12:21

Three genes, A, B, and C, are all on the same chromosome. The recombination rate between A and B is 24 cM, the recombination rate between A and C is 14 cM, and the recombination rate between B and C is 38 cM. Can you predict the order of the three genes?

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Answers (1)

Know the Answer?

Marcus · Answer 1

The correct answer will be - B-A-C

Explanation:

Genetic recombination is the process associated with the exchange of genetic material between homologous chromosomes.

The recombination rate represents the ratio of crossing over per million base pairs which shows that how genes are present at a distance from each other. This distance between the genes is measured in centimorgan (cM).

In the given question,

1. Distance between B and C - 38 cM (Longest distance)

2. Distance between A and B - 24 cM

3. Distance between A and C - 14 cM

This shows that B and C are present distantly that is

38 cM = 24 cM + 14 cM

This shows that A is present between B and C.

Thus, B-A-C is the correct answer.