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  5. Principle Of Inheritance And Variation

12th Class Biology Principle Of Inheritance And Variation Question Bank MCQs - Principles of Inheritance and Variation

  • question_answer
    Due to nondisjunction of chromosomes during spermatogenesis, sperms carry both sex chromosomes (22A + XY) and some sperms do not carry any sex chromosome (22A + X). If these sperms fertilize normal eggs (22A + X), what types of genetic disorders appear among the offsprings?

    A) Turner's syndrome and Klinefelter's syndrome

    B) Down's syndrome and Klinefelter's syndroos

    C) Down's syndrome and Turner's syndrome

    D) Down's syndrome and cri-du-chat syndrora

    Correct Answer: A

    Solution :

    Turner's syndrome and Klinefelter's syndrome


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