Question: A disorder results from the accumulation of phenylalanine in the body due to the absence of the gene for phenylalanine hydroxylase. Sufferers develop the condition if they consume phenylalanine-rich foods during development. How is this disorder diagnosed and treated? Need Assignment Help? Question options: Diagnosed by low tyrosine levels in blood; treated with a high-protein diet. Diagnosed by high levels of phenylpyruvic acid in urine; treated with a phenylalanine-free diet during childhood. Diagnosed by abnormal brain scans; treated with physical therapy. Diagnosed by genetic screening; treated with surgery to repair the defective gene.