Study the pedigree chart given below:
What does it show?
1. | Inheritance of a sex-linked inborn error of metabolism |
2. | Inheritance of a condition like phenylketonuria as an autosomal recessive trait |
3. | The pedigree chart is wrong as this is not possible |
4. | Inheritance of a recessive sex-linked disease like haemophilia |
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A woman with normal vision but with colorblind father marries a colorblind man. The fourth child of the couple is a boy. This boy
1. May or may not be colorblind
2. Must be colorblind
3. Must have normal vision
4. Will be partially colorblind due to being heterozygous