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Genes for cytoplasmic male sterility in plants are generally located in

1. cytosol
2. chloroplast genome
3. mitochondrial genome
4. nuclear genome

Correct answer: mitochondrial genome

Solution

Cytoplasmic male sterility is usually caused by mutations or rearrangements in mitochondrial DNA, which is inherited through the cytoplasm. These mitochondrial changes can disrupt pollen formation while leaving the rest of the plant largely normal.

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