The movement of a gene from one linkage group to another is called

Options

A. Inversion
B. Duplication
C. Translocation
D. Crossing over

Answer

To solve the question "The movement of a gene from one linkage group to another is called:", we need to analyze the options provided and understand the definitions of each term.

### Step-by-Step Solution:

1. **Understand the Options**: The question provides four options: inversion, duplication, translocation, and crossing over. We need to define each term to find the correct answer.

2. **Define Inversion**: Inversion refers to the rearrangement of genes on the same chromosome. In this process, a segment of the chromosome is reversed end to end. Importantly, there is no movement of the gene to a different linkage group; it remains on the same chromosome.

- **Hint**: Inversion involves rearranging genes but does not move them to another linkage group.

3. **Define Duplication**: Duplication is the process where a segment of a chromosome is duplicated, resulting in two copies of that segment. Similar to inversion, this also does not involve moving a gene to a different linkage group; it simply increases the number of genes on the same chromosome.

- **Hint**: Duplication increases gene copies but keeps them within the same linkage group.

4. **Define Translocation**: Translocation is the process where a gene or a segment of a chromosome moves from one linkage group to another. This is a chromosomal aberration that results in the transfer of genetic material between non-homologous chromosomes.

- **Hint**: Translocation is the only option that involves moving a gene to a different linkage group.

5. **Define Crossing Over**: Crossing over occurs during meiosis and involves the exchange of genetic material between homologous chromosomes. This process does not involve the movement of genes between different linkage groups but rather the exchange of genes within the same linkage group.

- **Hint**: Crossing over is about exchanging genes between homologous chromosomes, not moving them to different linkage groups.

6. **Conclusion**: Based on the definitions analyzed, the correct answer to the question is **translocation**, as it specifically refers to the movement of a gene from one linkage group to another.

### Final Answer:
The movement of a gene from one linkage group to another is called **translocation**.