A phenomenon which works opposite to the linkage is

Options

A. Independent assortment
B. Crossing over
C. Segregation
D. Mutation

Answer

**Step-by-Step Solution:**

1. **Understanding Linkage**:
- Linkage refers to the phenomenon where two or more genes located on the same chromosome tend to be inherited together because they are physically close to each other. This proximity means that during meiosis, they are less likely to be separated by crossing over.

2. **Characteristics of Linked Genes**:
- Linked genes show a low frequency of recombination. This means that when gametes are formed, the alleles of these genes are usually passed on together rather than being mixed with other alleles.

3. **Identifying the Opposite Phenomenon**:
- The opposite of linkage is a process that allows for the separation of these linked genes. This process is known as crossing over.

4. **Understanding Crossing Over**:
- Crossing over occurs during meiosis when homologous chromosomes exchange segments of genetic material. This exchange increases genetic variation by producing new combinations of alleles.

5. **Conclusion**:
- Therefore, the phenomenon that works opposite to linkage is crossing over.

**Final Answer**: The phenomenon which works opposite to linkage is crossing over.

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