question_answer

Study the pedigree chart given below. What does it show?

A)  Inheritance of a recessive sex-linked disease like haemophilia

B)  Inheritance of a sex-linked inborn error of metabolism like phenylketonuria

C)  Inheritance of a condition like phenylke- tonuria as an autosomal recessive trait

D)  The pedigree chart is wrong as this is not possible