Binary Fission > Simple Binary Fission

Simple binary fission is an asexual reproduction process in which a single Amoeba cell divides along a randomly oriented plane to form two genetically identical daughter cells.

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When a unicellular organism divides into two identical daughter cells in any plane, due to lack of definite shape, it is called simple binary fission.

Example: Amoeba

1. Cell Growth
   The parent Amoeba increases in size and prepares for division by synthesising necessary proteins and organelles.
2. DNA Replication
   Inside the nucleus, the genetic material duplicates exactly, ensuring each daughter nucleus receives a full set of chromosomes.
3. Nuclear Division (Mitosis)
   The nuclear membrane dissolves, and the replicated chromosomes segregate into two daughter nuclei.
4. Cytokinesis
   A cleavage furrow forms at any random plane of the cell. The cell membrane pinches inward, separating the cytoplasm into two nearly equal portions.
5. Formation of Daughter Cells
   Two independent Amoeba cells emerge, each containing one nucleus and sufficient cytoplasm and organelles to function and grow.

Amoeba: stages in simple binary fission

• Simple binary fission is an asexual reproduction method in which a unicellular organism, such as an Amoeba, divides along a random plane to produce two genetically identical daughter cells.
• The process begins with cell growth and DNA replication, ensuring that the parent cell synthesises the necessary proteins and creates an exact duplicate of its genetic material.
• Following replication, the cell undergoes nuclear division (mitosis), during which the nuclear membrane dissolves and the duplicated chromosomes separate into two distinct daughter nuclei.
• The final step is cytokinesis, wherein a cleavage furrow forms randomly, pinching the cell membrane inward to divide the cytoplasm and release two independent, fully functional daughter cells.