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Phenylketoniuria is autosomal recessive ...

Phenylketoniuria is autosomal recessive disorder of chromosome

A

11

B

12

C

16

D

17

Text Solution

AI Generated Solution

The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Phenylketonuria (PKU)**: Phenylketonuria is a genetic disorder characterized by the inability of the body to properly metabolize the amino acid phenylalanine. This condition is caused by a deficiency of the enzyme phenylalanine hydroxylase. 2. **Role of Phenylalanine Hydroxylase**: This enzyme is crucial for converting phenylalanine into another amino acid called tyrosine. When this enzyme is not produced or does not function properly, phenylalanine accumulates in the body. 3. **Consequences of PKU**: The accumulation of phenylalanine can lead to various health issues, including intellectual disability, developmental delays, and other neurological problems due to its toxic effects on the brain. 4. **Genetic Basis of PKU**: PKU is inherited in an autosomal recessive manner. This means that an individual must inherit two copies of the mutated gene (one from each parent) to exhibit the disorder. 5. **Chromosomal Location**: The gene responsible for coding the enzyme phenylalanine hydroxylase is located on chromosome number 12. This is the key information needed to answer the question. 6. **Conclusion**: Therefore, the correct answer to the question is that phenylketonuria is an autosomal recessive disorder associated with chromosome number 12. **Final Answer**: Chromosome number 12. ---
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