The male has a mutation in his mitochondria. During segregation, the mutation is found in:

None of the progeny

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One third of progeny

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Half of progeny

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Whole of progeny

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Solution

The correct option is A None of the progeny
Genes are present in the nucleus and also in the genomes of chloroplast and mitochondria.
The nuclear genes follow the Mendelian, biparental inheritance but the genes present in chloroplast and mitochondria follow cytoplasmic inheritance.
It means that these genes are transmitted with the cytoplasm. The female gamete contributes cytoplasm to the developing embryo.
Therefore, the traits controlled by cytoplasmic factors follow maternal inheritance.
Here, the male has a mutation in his mitochondria that does not contribute cytoplasm to the development of the zygote; therefore the mutation does not appear in any progeny.
So, the correct answer is option A.

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