Mitosis Celular

Mitosis Cellular: Understanding Cell Division

Introduction to Mitosis

• The concept of cellular mitosis is introduced, emphasizing its significance in the life cycle of a cell.

• Mitosis is described as the process through which a parent cell divides to form two identical daughter cells, ensuring genetic material is accurately replicated.

Types of Cells Involved

• The discussion highlights somatic cells, which encompass all body cells except for reproductive cells (gametes).

Phases Leading to Mitosis

• Interphase is identified as a crucial preparatory phase where DNA replication occurs, ensuring that genetic information is duplicated.

• Interphase consists of three stages:

• G1 Phase: Organelles grow and duplicate.

• S Phase: DNA replication takes place.

• G2 Phase: Genetic material condenses and prepares for division.

The Process of Mitosis

• Mitosis itself unfolds in four key phases:

• Prophase: Chromatin condenses into chromosomes; the nuclear membrane disintegrates.

• Metaphase: Chromosomes align at the cell's equator due to spindle fibers from centrosomes.

Final Stages of Mitosis

• During Anaphase, spindle fibers pull sister chromatids apart towards opposite poles of the cell.

• In Telophase, nuclear membranes reform around each set of chromosomes, and cytokinesis begins with plasma membrane division.

Genetic Consistency Post-Mitosis