Probability of cross over occurring between two genes on the same chromsome is

Options

A. Unrelated to distannce between them
B. Increased if they are close together
C. Increased if they are far apart
D. None of the above

Answer

To solve the question regarding the probability of crossover occurring between two genes on the same chromosome, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Crossover**: Crossover is a genetic process that occurs during meiosis where two chromosomes exchange segments of genetic material. This results in new combinations of genes.

2. **Gene Distance and Crossover Probability**: The probability of crossover occurring between two genes on the same chromosome is influenced by the distance between those genes.

3. **Proportional Relationship**: It is established that the probability of crossover is proportional to the distance between the two genes. This means that as the distance increases, the likelihood of crossover occurring also increases.

4. **Analyzing the Options**:
- **Unrelated to distance**: This option is incorrect because the probability of crossover is indeed related to the distance.
- **Increased if they are close together**: This option is also incorrect since closer genes have a lower probability of crossover.
- **Increased if they are far apart**: This is the correct option because greater distance between genes increases the probability of crossover.
- **None of these**: This option is incorrect as we have identified the correct relationship.

5. **Conclusion**: Therefore, the correct answer to the question is that the probability of crossover occurring between two genes on the same chromosome is increased if they are far apart.

### Final Answer:
The probability of crossover occurring between two genes on the same chromosome is **increased if they are far apart**.

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