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NEET Biology Principle Of Inheritance And Variation Question Bank Interaction of Gene and Cytoplasmic Inheritance

  • question_answer
    The phenotypic ratio obtained in quantitative inheritance of a dihybrid cross is [DPMT 2004]

    A) 1 : 2 : 1

    B) 1 : 4 : 6 : 4 : 1

    C) 1 : 6 : 15  20 : 15 : 6  : 1

    D) 9 : 3 : 3 : 1

    Correct Answer: B

    Solution :

    Ratio 1 : 4 : 6 : 4 : 1 it is due to two pairs of genes. But if it is due to 3 pairs of genes, the size ratio shall be 1 : 6 : 15 : 20 : 15 : 6 : 1.


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