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NEET Biology Principle Of Inheritance And Variation Question Bank Critical Thinking

  • question_answer
    In Drosophila, long wing and broad abdomen characters are dominant over to characters vestigeal wing and narrow abdomen. A pure breeding Drosophila having long wings and broad abdomen is crossed with a pure breeding vestigeal-winged and narrow-abdomened Drosophila. Two of the \[{{F}_{1}}\]individuals were crossed and the following results were produced in the\[{{F}_{2}}\] generation Long wing, broad abdomen in 482 Drosophila. Vestigeal wing, narrow abdomen in 154 Drosophila. Which one of the following is illustrated by these results

    A) Autosomal linkage

    B) Incomplete dominance

    C) Mendelian monohybrid inheritance

    D) Mendelian dihybrid inheritance

    Correct Answer: A

    Solution :

      Broad abdomen or narrow abdoman character is linked to the long wing or vestigeal wing character, hence these two characters do not show independent assortment as revealed by the F2 ratio. The F2 ratio shows here is i.e., for one character only.


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