1.

Study the pedigree chart given below What does its showA. Inheritance of a sex-linked inborn error of metabolism like phenylketonuriaB. Inheritance of a condition like phenylketonuria as an autosomal recessive traitC. The pedigree chart is wrong as this is not possibleD. Inheritance of a recessive sex-linked disease like haemophilia

Answer» Correct Answer - D
In the given pedigree chart, squares are representing males and circles females. In `F_(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 diseases like haemophilia.


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