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Percentage of recombination between A an...

Percentage of recombination between A and B is 9% , A and C is 17%. B and C is 26%, then the arrangement of genes is

A

ABC

B

ACB

C

BCA

D

BAC

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To solve the problem of determining the arrangement of genes A, B, and C based on the given recombination percentages, we can follow these steps: ### Step 1: Understand the Recombination Percentages We are given the following recombination percentages: - A and B: 9% - A and C: 17% - B and C: 26% ### Step 2: Analyze the Recombination Data Recombination frequency is directly proportional to the distance between genes on a chromosome. Therefore, the greater the percentage of recombination, the farther apart the genes are likely to be. ### Step 3: Identify the Maximum Distance From the data: - The recombination between B and C is the highest at 26%, indicating that B and C are the farthest apart. - The recombination between A and C (17%) is greater than that between A and B (9%). ### Step 4: Arrange the Genes Based on Distances Given the distances: - Since B and C are the farthest apart (26%), we can place them at the ends of our arrangement. - A and B are closer together (9%), suggesting A is closer to B than to C. - A and C have a recombination of 17%, which is greater than A and B. ### Step 5: Construct the Gene Arrangement Based on the distances: - Place B and C at the ends: B - C - Since A is closer to B (9%) than to C (17%), we can place A next to B. Thus, the arrangement of genes is: **B - A - C**. ### Step 6: Confirm the Arrangement To confirm: - The distance between B and A is 9% (correct). - The distance between A and C is 17% (correct). - The distance between B and C is 26% (correct). ### Final Arrangement The correct arrangement of the genes is **BAC**. ---
To solve the problem of determining the arrangement of genes A, B, and C based on the given recombination percentages, we can follow these steps: ### Step 1: Understand the Recombination Percentages We are given the following recombination percentages: - A and B: 9% - A and C: 17% - B and C: 26% ...
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