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  3. 12th Class
  4. Biology
  5. Principle Of Inheritance And Variation

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

  • question_answer
    Sex determination by chromosomal difference in man and Drosophila is by mechanism called

    A) XX-XY                   

    B) XX-XO

    C) ZZ-ZW

    D) Both [a] and [b]

    Correct Answer: A

    Solution :

    XX-XY


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