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    Biology
    Grade-9
    Easy

    Question

    Which of the following can cause variations?

    1. Sexual reproduction
    2. Mutation
    3. Gene flow
    4. All of the above

    hintHint:

    Variation is the difference in arrangement of genetic material in the members of a species.

    The correct answer is: All of the above

      • Any factor which affects the arrangement of genetic material results in variation
      • In sexual reproduction, zygote is formed by receiving 50% of gene from each parent. The combination of the genes from both parents results in a unique offspring different from the parents.
      • Mutation is the change in the sequence of genetic material caused due to inborne errors or due to external factors, which causes variation among population.
      • Gene flow also produces variation
      • Hence, mutation, sexual reproduction and gene flow all causes variation among population

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