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NEET Biology Principle Of Inheritance And Variation Question Bank Linkage and Crossing Over

  • question_answer
    The evidence that crossing over occurs at four stranded stage and not at two stranded stage of the chromosomes, comes from [DPMT 1993]

    A) 2 : 2 : 2 : 2 arrangement of ascospores in Neurospora

    B) 4 : 4 arrangement of ascospores in Neurospora

    C) Studies of meiosis in maize

    D) Studies on linkage maps of chromosomes in Drosophila

    Correct Answer: A

    Solution :

      In Neurospora it produces 4 types of ascospores two of one parental type, two of other parental type, two of one recombinant and another two of second recombinant type.


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