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Question

Study the pedigree chart given below

What does it show?

A
Inheritance of a sex-linked inborn erro of metabolism like phenylketonuria
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B
Inheritance of a condition like phenylketonuria as an autosomal recessive trait
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C
The pedigree chart is wrong as this is not possible
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D
Inheritance of a recessive sex-linked disease like haemophilia
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Solution

The correct option is D Inheritance of a recessive sex-linked disease like haemophilia
The given pedigree analysis shows inheritance 0of a recessive sex-linked disease like haemophilia. In this disease, the gene causing haemophilia goes to son from mother and to daughter from the father.

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