Biology: DNA Recombination
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Questions and Answers

When does DNA recombination occur in the cell's life cycle?

  • During meiotic cell division and DNA repair processes (correct)
  • Only during mitotic cell division
  • At the end of the cell's life cycle
  • Only during DNA repair processes
  • What is the primary outcome of DNA recombination during sexual reproduction?

  • Genome instability
  • Cell death
  • Increased genetic similarity among individuals
  • New combinations of genes (correct)
  • What is the significance of DNA recombination in biological evolution?

  • It has no impact on evolution
  • It slows down the process of evolution
  • It leads to the extinction of species
  • It provides new genetic material for natural selection (correct)
  • What is the role of DNA recombination in maintaining genome integrity?

    <p>It maintains the integrity of the genome</p> Signup and view all the answers

    What is the primary function of DNA recombination in living cells?

    <p>To increase genetic diversity</p> Signup and view all the answers

    What is the primary purpose of genetic crossing over during meiosis?

    <p>To increase genetic diversity by shuffling alleles</p> Signup and view all the answers

    Which type of recombination is catalyzed by enzymes called integrases?

    <p>Site-specific recombination</p> Signup and view all the answers

    What is the result of exchanging genetic material between homologous chromosomes during meiosis?

    <p>New combinations of alleles</p> Signup and view all the answers

    Which of the following is an example of site-specific recombination?

    <p>Cre-lox system</p> Signup and view all the answers

    What is the primary function of homologous recombination?

    <p>To repair DNA damage</p> Signup and view all the answers

    In which stage of meiosis does genetic crossing over occur?

    <p>Prophase I</p> Signup and view all the answers

    Which type of recombination is used in genetic engineering to introduce specific genetic changes?

    <p>Site-specific recombination</p> Signup and view all the answers

    What is the result of homologous recombination in gene targeting?

    <p>Precise modification of genes</p> Signup and view all the answers

    Which mechanism of homologous recombination involves the exchange of genetic material between two DNA molecules?

    <p>Homologous recombination</p> Signup and view all the answers

    Study Notes

    DNA Recombination

    • DNA recombination is a vital biological process that involves the rearrangement and exchange of genetic information between DNA molecules.
    • This process occurs naturally during sexual reproduction and cell division, playing a crucial role in genetic diversity and biological evolution.
    • During recombination, homologous chromosomes exchange parts of their genetic information, resulting in new combinations of genes.
    • This exchange increases genetic diversity among individuals within the same species and provides new genetic material for natural selection and evolution.

    Stages of DNA Recombination

    • DNA recombination occurs at different stages of the cell's life cycle.
    • Meiotic cell division in sexual reproduction is one stage where DNA recombination takes place.
    • Some DNA repair processes also involve DNA recombination.

    Importance of DNA Recombination

    • DNA recombination plays a crucial role in maintaining the integrity of the genome.
    • It is essential for the evolution of living organisms.

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    Test your understanding of DNA recombination, a vital biological process that increases genetic diversity through the exchange of genetic information between DNA molecules.

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