The Figueroa family has a genetically inherited trait called ocular albinism-lack of pigment in the eye-which is caused by a 516-bp deletion in an exon of a single gene. DNA for this gene was amplified from each member of the family and run on the gel shown below. The thickness of the band indicates relative amount of DNA. Use the pedigree and the gel to determine the most likely mode of inheritance for this disease. Becky Ben Jasper Lyla Sam Autosomal dominant Cannot be determined Autosomal recessive X-linked dominant X-linked recessive Becky Jasper Lyla Ben Sam

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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.