Cystic fibrosis (CF) is an inherited chronic disease that affects the lungs and digestive system of about 30,000 children and adults in the United States. It is caused by a recessive allele that encodes a defective chloride channel. Genetic screening has determined that two parents are carriers (heterozygous). What is the probability that they have a child with CF?

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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.