13 Use the information to answer questions 13 and 14. Phenylketonuria (PKU) is caused by a mutation in a gene and results in an inability to digest certain foods. Children born with PKU must eat a special diet or they will develop sympt as seizures, smaller-sized heads, and learning disabilities. PKU is inherited as a recessive trait. The partial Punnett square shows two parents who are carriers of PKU. a a If the parents decide to have a child, what is the percent chance that the child will be born with PKU? A 50% B 100% © 0% D 25% © O O O

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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.