(a) What is cytokinesis?

Verified step by step guidance

1. Understand that cytokinesis is a process related to cell division, specifically the final step where the cell physically divides into two daughter cells.
2. Recognize that cytokinesis follows the end of mitosis or meiosis, completing the cell cycle by splitting the cytoplasm and organelles between the two new cells.
3. Note that cytokinesis involves the formation of a contractile ring composed of actin and myosin filaments, which constricts the cell membrane to create a cleavage furrow in animal cells.
4. In plant cells, understand that cytokinesis occurs differently by building a new cell wall called the cell plate between the two daughter nuclei.
5. Summarize that cytokinesis ensures that each daughter cell receives an appropriate amount of cytoplasm and organelles, finalizing the division process after the genetic material has been separated.

Key Concepts

Cytokinesis

Cytokinesis is the process during cell division where the cytoplasm of a parent cell divides to form two daughter cells. It usually occurs after mitosis or meiosis, ensuring that each new cell receives the necessary cellular components.

Cell Cycle Phases

The cell cycle includes stages such as interphase, mitosis, and cytokinesis. Understanding these phases helps clarify when cytokinesis occurs and its role in completing cell division.

Mechanism of Cytokinesis

Cytokinesis involves the formation of a contractile ring made of actin and myosin filaments that pinches the cell membrane inward, creating a cleavage furrow that eventually splits the cell into two.