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KVPY Sample Paper KVPY Stream-SX Model Paper-12

  • question_answer
    If sexual reproduction takes place between the filaments of Rhizopus of different strains, one with 80 nuclei and another with 24 nuclei, what would be the total number of spores of different strains put together?

    A) 24

    B) 48

    C) 96

    D) 114

    Correct Answer: C

    Solution :

    Sexual reproduction in Rhizopus takes place by gametangial copulation. The fusing gametangia are multinucleate and genetically different. The resulting structure is a diploid zygospore. Here 24(n) nuclei from different filaments combine to form 24(2/n) nuclei which undergo meiosis to form 96 nuclei. (or spores) through sexual reproduction.


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