Genes for cytoplasmic male sterility in plants are located in

Options

A. Mitochondrial genome
B. Chloroplast genome
C. Nuclear genome
D. Cytosol

Answer

To answer the question about where the genes for cytoplasmic male sterility in plants are located, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Cytoplasmic Male Sterility (CMS)**:
- Cytoplasmic male sterility refers to a condition in plants where the male reproductive structures (anthers) do not produce functional pollen. This is often used in plant breeding to produce hybrid seeds.

2. **Identifying the Genetic Material**:
- In plants, genetic material is found in various locations: the nucleus (nuclear genome), mitochondria (mitochondrial genome), and chloroplasts (chloroplast genome). Each of these has a specific role in inheritance and function.

3. **Role of Mitochondria and Chloroplasts**:
- Mitochondria and chloroplasts are semi-autonomous organelles that have their own DNA. Mitochondria are primarily involved in energy conversion, while chloroplasts are involved in photosynthesis.

4. **Cytoplasmic Inheritance**:
- Cytoplasmic inheritance refers to the transmission of genetic material found in the cytoplasm, particularly in mitochondria and chloroplasts. This type of inheritance is distinct from nuclear inheritance.

5. **Location of CMS Genes**:
- Research has shown that the genes responsible for cytoplasmic male sterility in plants are located in the mitochondrial genome. This means that the traits associated with CMS are inherited through the maternal line, as mitochondria are passed down from the mother plant.

6. **Conclusion**:
- Therefore, the correct answer to the question is that the genes for cytoplasmic male sterility in plants are located in the **mitochondrial genome**.

### Final Answer:
The genes for cytoplasmic male sterility in plants are located in the **mitochondrial genome**.

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