2) A sperm that fertilizes an egg carries its mitochondria into the egg’s cytopl

Question

2) A sperm that fertilizes an egg carries its mitochondria into the egg’s cytoplasm. However, male-derived mitochondrial nucleoids have completely disappeared within 60 min after fertilization. This experimental observation is most likely due to ________________.

a) The “bottle-neck” inheritance of mitochondria.

b) The degradation of mitochondrial proteins.

c) The degradation of mitochondrial DNA.

d) The dilution of male-derived mitochondria in the egg’s cytoplasm.

e) The incompatibility of male and female mitochondria.

Explanation / Answer

Answer C

Degradation of mitochondrial DNA

This occurs by ubiquitin proteasome degradation pathway .

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