The Human Egg Has About 2000 Mitochondrial Genomes, but Somatic

question 10

Multiple Choice

The human egg has about 2000 mitochondrial genomes, but somatic cells have a range of hundreds to thousands. Which of the following is most likely to account for the difference?

• A)Heteroplastic cells can give rise to homoplastic cells.
• B)Large mitochondria in oocytes can divide into many smaller mitochondria, and smaller mitochondria can fuse.
• C)Specific tissue types replicate organelle DNA far more frequently than they do nuclear DNA.
• D)Mutant mitochondria replicate at different frequencies than do wild type.
• E)Haploid organelle genomes can replicate to form diploid or polyploidy genomes.

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