Mateo, an infant, is on a special diet as his parents are aware that he has a genetic disorder in which he cannot metabolize phenylalanine, an amino acid. Mateo's parents are also aware of the importance of this diet and that excess phenylalanine buildup in the infant will produce intellectual disability and hyperactivity. This genetic disorder results from a

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This genetic disorder is a recessive inherited condition, meaning that the affected individual must inherit two copies of the mutated gene, one from each parent, in order to display symptoms. If only one parent carries the mutated gene, they are considered a carrier, and if both parents carry the mutated gene, there is a 25% chance of their child being affected by the disorder.

Mateo, an Infant, Is on a Special Diet as His