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What is the mode of inheritance for phenylketonuria?

Phenylketonuria is an autosomal recessive genetic disorder. This means that an individual must inherit two copies of the defective gene (one from each parent) in order to develop the condition.


How possible is it that a parent can pass phenylketonuria to its offspring?

It is possible for a parent with phenylketonuria to pass the condition to their offspring if both parents are carriers of the PKU gene mutation. In this case, there is a 25% chance that their child will inherit two copies of the mutated gene and develop phenylketonuria. Genetic testing can provide more information on the risk of passing PKU to offspring.


Is phenylketonuria a point mutation?

Phenylketonuria (PKU) is primarily caused by a genetic mutation in the PAH gene, which encodes the enzyme phenylalanine hydroxylase. This mutation is often a point mutation, which involves a single nucleotide change in the DNA sequence that can lead to a dysfunctional enzyme. However, PKU can also result from other types of mutations, including deletions or insertions, but point mutations are the most common cause.


A person who has what is unable to break down the amino acid phenylalanine?

A person with phenylketonuria (PKU) is unable to break down the amino acid phenylalanine due to a deficiency in the enzyme phenylalanine hydroxylase. This can lead to a build-up of phenylalanine in the body, which can be toxic to the brain and nervous system if not controlled through dietary restrictions.


Why dont food chains occur often in nature?

Food chains do not occur often in nature because, many organisms do specialize in their diets.