- Phenylketonuria is caused by a mutation to a gene. Which genotype would result in the condition and what is the consequence?
| Genotype | Consequence |
|---|---|
| A. AA only | Tyrosine is converted to phenylalanine |
| B. aa only | Tyrosine is not converted to phenylalanine |
| C. AA and Aa | Phenylalanine is converted to tyrosine |
| D. aa only | Phenylalanine is not converted to tyrosine |