1. Replication: The bacterial cell replicates its single circular chromosome, creating two identical copies.
2. Growth: The cell grows in size and elongates.
3. Division: The cell wall and plasma membrane begin to pinch inward at the middle of the cell. This forms a septum, separating the two copies of the chromosome.
4. Separation: The septum fully divides the cell into two identical daughter cells, each containing a complete copy of the original bacterial DNA.
Key Features of Binary Fission:
* Asexual Reproduction: No exchange of genetic material between cells.
* Rapid Process: Bacteria can divide every 20 minutes under optimal conditions, leading to rapid population growth.
* Genetic Variation: While binary fission produces identical offspring, mutations can occur during DNA replication, introducing some genetic variation over time.
Other Methods of Reproduction:
While binary fission is the primary method of bacterial reproduction, some bacteria can also engage in other forms, such as:
* Budding: A smaller outgrowth from the parent cell separates to form a new cell.
* Fragmentation: The bacterial cell breaks into multiple fragments, each capable of developing into a new cell.
However, these methods are less common than binary fission.
