Genes for cytoplasmic male sterility in plants are located in

Options

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

Answer

### Step-by-Step Solution:

1. **Understanding Cytoplasmic Male Sterility (CMS)**:
- Cytoplasmic male sterility is a condition in plants where the male reproductive organs (anthers) are unable to produce viable pollen. This trait is important for hybrid seed production.

2. **Identifying the Genetic Location**:
- The question asks where the genes responsible for CMS are located. The options given are:
- Mitochondrial genome
- Cytosol
- Chloroplast genome
- Nucleogenome

3. **Analyzing Each Option**:
- **Mitochondrial Genome**: This is the genetic material found in mitochondria, which are cellular organelles responsible for energy production. It is known that CMS is associated with mitochondrial genes.
- **Cytosol**: This is the fluid part of the cytoplasm where various cellular processes occur, but it does not contain genetic material.
- **Chloroplast Genome**: This is the genetic material found in chloroplasts, which are involved in photosynthesis. While chloroplasts have their own DNA, they are not responsible for CMS.
- **Nucleogenome**: This refers to the nuclear genome, which contains the majority of the plant's genetic information. CMS is not determined by nuclear genes.

4. **Conclusion**:
- The genes responsible 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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