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

Options

A. ABC
B. ACB
C. BCA
D. BAC

Answer

To determine the arrangement of genes A, B, and C based on the given recombination percentages, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Given Data**:
- Recombination percentage between A and B (AB) = 9%
- Recombination percentage between A and C (AC) = 17%
- Recombination percentage between B and C (BC) = 26%

2. **Analyze the Recombination Percentages**:
- The recombination percentage indicates the distance between genes. A lower percentage means the genes are closer together, while a higher percentage indicates they are further apart.
- Here, AB (9%) is the smallest, indicating that A and B are the closest genes.
- AC (17%) is the next smallest, indicating that A and C are further apart than A and B but closer than B and C.
- BC (26%) is the largest, indicating that B and C are the furthest apart.

3. **Determine the Gene Arrangement**:
- Since A and B are the closest (9%), we can place A and B next to each other.
- Next, since A and C are closer than B and C (17% vs. 26%), we can place C further away from A and B.
- Thus, the arrangement of the genes can be deduced as A, B, and then C.

4. **Final Arrangement**:
- The correct arrangement of the genes based on the recombination percentages is A - B - C.

### Conclusion:
The arrangement of genes is A, B, C.

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