DNA is directly inherited from an organism's parents, via their gametes, which are produced by the process of Gametogenesis. Thus, if a person has phenylketonuria, they have inherited genetic information that has lead to the production of a dysfunctional protein, specifically a(n) enzyme that normally breaks down phenylalanine.
Phenylketonuria is a rare genetic disease characterized by the presence of a mutation responsible for altering the function of an enzyme in the body responsible for converting the amino acid phenylalanine into tyrosine, which leads to the accumulation of phenylalanine in the blood, which in large concentrations is toxic to the human body.
With this information, we can conclude that DNA is inherited directly from the parents of an organism, through its gametes, which are produced by the process of Gametogenesis. So, if a person has phenylketonuria, they have inherited genetic information that led to the production of a dysfunctional protein, specifically an enzyme (n) that normally breaks down phenylalanine.
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