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NEET2018ZoologyPrinciples of Inheritance and VariationActual

Assertion : A person may be a haemophilic, only if his mother is a carrier or colourblind. Reason: The male parent cannot pass on a sex-linked gene to his son.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion.
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion.
  3. CIf assertion is true but reason is false.
  4. DIf both assertion and reason are false.

Correct answer

A. If both assertion and reason are true and reason is the correct explanation of assertion.

Step-by-step solution

Haemophilia is a X-linked disease. As a person receives X chromosome from mother and Y from father, therefore the person may be a haemophilic if his mother is carrier of the disease. The person will be certainly haemophilic if his mother is haemophilic.

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