Briefly explain about genetic recombination in bacteria.
Question
Briefly explain about genetic recombination in bacteria.
Solution
Genetic recombination in bacteria is a process where genetic material, contained in DNA, is broken and then joined to a different DNA molecule. This process contributes to the genetic diversity of bacteria. Here are the steps:
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Conjugation: This is the process where two bacteria connect and exchange genetic material. One bacterium, the donor, extends a tube-like structure called a pilus to the recipient bacterium and transfers DNA.
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Transformation: In this process, bacteria take up genetic material from their surroundings. The DNA from a dead and broken-down bacterium is absorbed by a live bacterium. The absorbed DNA can then be integrated into the genome of the live bacterium, changing its characteristics.
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Transduction: This process involves a bacteriophage, a type of virus that infects bacteria. The bacteriophage attaches to a bacterium and injects its DNA. The bacterium then replicates the phage DNA. Sometimes, the phage DNA may include some of the host bacterium's DNA. When the bacteriophage goes on to infect another bacterium, it can transfer this DNA to the new host.
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Homologous Recombination: This is a process where a bacterium can swap a segment of its DNA with a segment of DNA from another bacterium that has a similar sequence. This can lead to new combinations of genes.
These processes allow bacteria to adapt to new environments, evolve new characteristics, and develop resistance to antibiotics.
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