cell cycle

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Cell Cycle and Cell Division

Cell Division

• - the process a cell undergoes in order to make copies of itself.

• Why do cells divide?

DNA & Chromosomes

• DNA is chromatin strands and chromosomes

Interphase (about 90% of the cell cycle time)

• Cell mature• Chromosomes copy

themselves

Mitosis: Prophase

• Nuclear membrane disappears

• Spindle fibers form at the poles of the cell

Mitosis: Metaphase

• Chromosomes line up at the middle

• 2 Spindle fibers attach to each centromere

Mitosis: Anaphase

• Centromeres split and the fiber strands pull the chromosomes to each pole

Mitosis: Telophase

• 2 new nuclei form at two poles of the cell where chromosomes have gathered

• Mitosis (division of one nucleus into two identical nuclei) is complete

Cytokinesis

Two new daughter cells are formed

Mitotic Cell Cycle Binary Fission Mitotic Cell Cycle

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