Deletions in the mitochondrial DNA can result in parasitic mitochondria which do not respire but reproduce faster than normal mitochondria in a yeast cell.  However, yeast cells that harvest energy only through fermentation multiply less slowly and have decreased fitness. When yeast cells containing varying populations of parasitic and normal mitochondria are grown in cultures with different cell densities over several generations, it is expected that    A. normal mitochondria will be rare in large yeast cell populations. B. averaged across populations, yeast cells with normal mitochondria remained at intermediate levels. C.  parasitic mitochondria will be rare in large yeast cell populations. D. parasitic mitochondria will be rare in small yeast cell populations.

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Mitochondrial Mutations

A mitochondrion is a cellular organelle that serves as the site for cellular respiration and energy production (ATP or Adenosine Triphosphate). It is a double-membrane-bound organelle and is only present in eukaryotic cells.