2. Questions Bank
  3. NEET
  4. Biology
  5. Principle Of Inheritance And Variation

NEET Biology Principle Of Inheritance And Variation Question Bank Self Evaluation Test - Principles of Inheritance and Variation

  • question_answer
    One child is haemophilic (sex-linked trait), while its fraternal twin brother is normal. Which one of the following informations is most appropriate?

    A) The mother must have been heterozygous.

    B) The child is a monozygotic twin.

    C) The other child is a female and the father is haemophilic.

    D) The haemophilic child is a male.

    Correct Answer: A

    Solution :

    [a] The mother must have been a haemophilic carrier (X"X). One of the twins would have inherited the normal X chromosome and the other would have received the X chromosome carrying the gene for haemophilia.


You need to login to perform this action.
You will be redirected in 3 sec spinner