SSC General Science & Technology Sample Paper NCERT Sample Paper-7

  • question_answer
    Consider the following statements
    1. The first transgenic cow is Rosie.
    2. The milk of first transgenic cow contained the human alpha-lactalbumin. Which of the statements given above is/are correct about transgenic cow?

    A)  Both 1 and 2    

    B)  Only 1

    C)  Only 2 

    D)  neither 1 nor 2

    Correct Answer: A

    Solution :

    [a] Transgenic animals are the genetically modified organisms which have a foreign gene in their genome due to which they show certain properties which are different from non-genetically modified organisms. Transgenic animals can be produced by using three basic methods which are: - DNA microinjection - Retro virus-mediated gene transfer - Embryonic stem cell-mediated gene transfer. The first transgenic animals were mice created by Rudolf Jaenisch in 1974.

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