What is binary fission?giving suitable exm show it with help diagram?
Answers
Binary fission is the process through which asexual reproduction happens in bacteria. During binary fission, a single organism becomes two independent organisms. Binary fission is also used to describe the duplication of organelles in eukaryotic species, and is sometimes used to describe the reproduction of some invertebrates that asexually reproduce through budding. Though their cells undergo mitosis, the process is known as binary fission as it produces two organisms from one. In the similar multiple fission, an organism divides into more than two copies.
Binary Fission Steps
Binary Fission
Before binary fission of a prokaryote, as seen in step 1 of the above graphic, a prokaryote’s DNA is tightly wound. Sometimes, the prokaryote will carry small plasmids, which are small rings of DNA that carry extra genetic information. During the second step of binary fission, the DNA is unraveled. As it is unraveled, proteins gain access to the DNA, which are able to replicate the ring of DNA. The same proteins work on the plasmids in the cell, duplicating them as well. By step 3, both the DNA and plasmids have been duplicated. The individual copies of DNA attach themselves to different parts of the cell membrane. As the cell elongates in preparation for division, the DNA molecules are pulled to different sides of the cell.
At step 4, a cleavage furrow appears in the cell membrane, as the cell wall and membrane start to pinch off and create two new cells. Finally, as seen in step 5, the cells become completely separated from one another as a new bacterial cell wall forms. The final step includes breaking any additional proteins or other molecules that still connect the two cells. Each cell now has everything it needs to continue the functions of life independently.