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Molecular Basis Of Inheritance

Question
CBSEENBI12002621

Study the pedigree chart given below.



what does it show?

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

  • Inheritance of a condition like phenylketonuria as an autosomal recessive trait

  • The pedigree chart is wrong as this is not possible

  • Inheritance of recessive sex-linked diseases like haemophilia

Solution

D.

Inheritance of recessive sex-linked diseases like haemophilia

In the given pedigree chart, squares are representing males and circles females. In an F1 generation, 1-male and 1- female are diseased and in next generation the only male is diseased. This shows the inheritance of a recessive sex-linked disease.