NEETZoologyPrinciples of Inheritance and Variation
Select the incorrectly matched pair regarding the Mendelian disorder and its mode of inheritance.
Options
- AHaemophilia : X-linked recessive
- BCystic fibrosis : Autosomal recessive
- CMyotonic dystrophy : Autosomal dominant
- DPhenylketonuria : Autosomal dominant
Correct answer
D. Phenylketonuria : Autosomal dominant
Step-by-step solution
Phenylketonuria is an inborn error of metabolism that is inherited as an autosomal recessive trait, not an autosomal dominant trait. Therefore, it is the incorrectly matched pair. Haemophilia is correctly matched as an X-linked recessive disorder. Cystic fibrosis is correctly matched as an autosomal recessive disorder. Myotonic dystrophy is correctly matched as an autosomal dominant trait. Answer: Phenylketonuria : Autosomal dominant