If distance between gene on chromosome is more, then gene shows :-

Options

A. Weak linkage
B. Strong linkage
C. Less crossing
D. 1 & 3 both

Answer

To solve the question regarding the relationship between the distance between genes on a chromosome and their linkage, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Linkage**:
- Linkage refers to the tendency of genes that are located close to each other on the same chromosome to be inherited together during the process of meiosis.

2. **Distance Between Genes**:
- When genes are located far apart on a chromosome, the likelihood of them being inherited together decreases. This is because there is a higher chance of crossing over occurring between them during meiosis.

3. **Weak vs. Strong Linkage**:
- **Strong Linkage**: Occurs when genes are close together, leading to a higher probability of being inherited together.
- **Weak Linkage**: Occurs when genes are farther apart, resulting in a lower probability of being inherited together.

4. **Crossing Over**:
- Crossing over is the process where homologous chromosomes exchange segments during meiosis. The further apart two genes are, the more likely crossing over will occur between them, leading to new combinations of alleles.

5. **Conclusion**:
- Therefore, if the distance between genes on a chromosome is greater, the genes will show weak linkage and a higher frequency of crossing over.

### Final Answer:
The correct answer is **weak linkage**.

---