Final answer:
Phenylketonuria (PKU) is the genetic disorder associated with the described symptoms, caused by a deficiency in the enzyme phenylalanine hydroxylase, leading to the accumulation of phenylalanine.
Step-by-step explanation:
The genetic disorder typically associated with symptoms like seizures, hypotonia, ataxia, developmental delay, vision problems, hearing loss, and skin rashes with alopecia in young children is Phenylketonuria (PKU). PKU is a health condition caused by mutations in the genetic material, specifically a deficiency in the enzyme phenylalanine hydroxylase. This enzyme is crucial for converting phenylalanine into tyrosine. When this conversion does not occur, phenylalanine accumulates to toxic levels, leading to various symptoms, such as intellectual disability, delayed neurological development, hyperactivity, and skin rashes. Management of PKU involves a strict diet low in phenylalanine, the avoidance of artificial sweeteners like aspartame, and careful monitoring of intake of certain foods.