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DUMET Medical DUMET Medical Solved Paper-2006

  • question_answer
    Leaf colour in Mirabilis jalapa is an example of:

    A)  non-Mendelian inheritance

    B)  Mendelian inheritance

    C)  chemical inheritance

    D)  both [b] and [c]

    Correct Answer: A

    Solution :

    The inheritance due to the genes found is cytoplasm (mitochondria and chloroplast) is called cytoplasmic inheritance or non Mendelian inheritance. The leaves of Mirabilis jalapa may be green, white or variegated. This is due to plasted inheritance. A summary of the findings of Correns from various types of crosses in Mirabilis jalapa
    Leaf Phenotypeof The branch Used as Female parent Leaf Phenotype of The branch Used as male Parent Leaf Phenotype of Progeny   \[({{F}_{1}})\]
    Green White 1. Breen 2. White 3. Variegated 1. Green 2. White 3. Variegated Green Green Green White White White
    Variegated 1. Green 2. White 3. Variegated Green, white And variegated In variable ratios In each of the cases
    Note: Leaf phenotype of the progeny is the same that of the female parent. In the progeny from variegated female parents, green, white and variegated progeny are recovered in variable proportions. The inheritance of character on the basis of Mendels law (law of segregation and independent assortment) from parents to offspring is called Mendelian inheritance.


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