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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
    An unfertilised human egg contains two X-chromosomes.

    A) True                             

    B) False

    C) Cannot say       

    D) Partially true or false

    Correct Answer: B

    Solution :

    [b] An unfertilised human egg contains only one X-chromosome. A human sperm contains either an X or a Y-chromosome, thereby determining the sex of the offspring after fertilisation (XX - female, XY-male).


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