What does it show?
A) Inheritance of a sex-linked inborn error of metabolism like phenylketonuria
B) Inheritance of a condition like phenylketonuria as an autosomal recessive trait
C) The pedigree chart is wrong as this is not possible
D) Inheritance of a recessive sex-linked disease like hemophilia
Correct Answer: D
Solution :
In the given pedigree chart, squares are representing males and circles females. In \[{{\text{F}}_{\text{1}}}\]generation, 1-male and 1-female are diseased and in next generation only male is diseased. This shows the inheritance of a recessive sex-linked disease.
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