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

  • Option 1)

    inheritance of a condition like phenylketonuria as an autosomal recessive trait

  • Option 2)

    The pedigree chart is wrong as this is not possible

  • Option 3)

    Inheritance of a recessive sex - linked disease like haemophilia

  • Option 4)

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

 

Answers (1)

As we learnt in

phenylketonuria -

This is an inborn error of metabolism, also inherited as autosomal recessive trait.

- wherein

Also a kind of mendelian disorder

 

 

Pedigree shows autosomal recessive trait


Option 1)

inheritance of a condition like phenylketonuria as an autosomal recessive trait

This option is correct

Option 2)

The pedigree chart is wrong as this is not possible

This option is incorrect

Option 3)

Inheritance of a recessive sex - linked disease like haemophilia

This option is incorrect

Option 4)

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

This option is incorrect

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