Which of the following statements are true about penetrance and expressivity? Please make sure to select all correct answer options. O Incomplete penetrance and variable expressivity cannot cooccur for a given allele. O Penetrance describes the extent to which individuals with a given allele exhibit the phenotype associated with that allele. Penetrance and expressivity of a given allele is affected by both environmental factors and genetic backgrounds of different individuals. Expressivity measures the severity of the phenotype.

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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.