19- 18 - 17 16 15 14 13 12 11 10 9- 7- 6- 5- 4- 2- 0- 10 20 30 40 50 60 70 80 Generations FIGURE 28.11 Results of selective breeding for a high and low oil content, a quantitative trait in corn. Percentage of oil content

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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.