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

  1. A
    Inheritance of a condition like phenylketonuria as an autosomal recessive trait
  2. B
    The pedigree chart is wrong as this is not possible
  3. C
    Inheritance of a recessive sex-linked disease like haemophilia
  4. D
    Inheritance of a sex-linked inborn error of metabolism like phenylketonuria

Solution & Step-by-step Explanation

In the given pedigree, the trait appears in the children of unaffected parents (skipping generations). This is a hallmark of a recessive trait. Since both males and females are affected equally and it is not showing a criss-cross pattern, it is autosomal. Phenylketonuria () is a classic example of an autosomal recessive disorder.

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Study the pedigree chart given below:What does it show?
image
A
Inheritance of a condition like phenylketonuria as an autosomal recessive trait
B
The pedigree chart is wrong as this is not possible
C
Inheritance of a recessive sex-linked disease like haemophilia
D
Inheritance of a sex-linked inborn error of metabolism like phenylketonuria

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GeneticsPedigree AnalysisMendelian Disorders

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