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NEET2009ZoologyPrinciples of Inheritance and VariationActual

Study the pedigree chart given below What does it show?

Options

  1. AInheritance of a sex-linked inborn error of metabolism like phenylketonuria
  2. BInheritance of a condition like phenylketonuria as an autosomal recessive trait
  3. CThe pedigree chart is wrong as this is not possible
  4. DInheritance of a recessive sex-linked disease like haemophilia

Correct answer

B. Inheritance of a condition like phenylketonuria as an autosomal recessive trait

Step-by-step solution

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 disease.

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