I want to know what's the genetic disorder called pku?

Phenylalanine (Phe): Your genes pass the code to your cells for making enzymes it needs to utilize dietary substances. Food must be broken down to usable parts ; recycled in each cell to become the building blocks of cell walls, muscle, etc.In pku a kid inherits a bad code from both asymptomatic parents ; doesn't make the phe enzyme. A buildup of phe becomes toxic, can cause brain damage and phe spills into the urine.