The Cell Cycle Cell Division
Onion Cells
Cell Division A cell must divide to: Grow Reproduce Repair damaged tissues
The cell cycle is how cells grow and divide. 3 parts Interphase (Growth) Mitosis (Division) Cytokinesis (Cell Splits)
Stage 1: Interphase Interphase is the growth stage Cell Grows Genetic material is copied Prepares for division
Interphase makes up most of the cell cycle & takes the longest!
Review What is the longest stage of the cell cycle? Metaphase Interphase Chromophase Mitosis
The Genetic Material All genetic material is found in the nucleus The genetic material is called DNA DNA is contained in thread-like structures called Chromosomes
Stage 2: Mitosis Mitosis is when the cell nucleus divides into two identical nuclei. New cells are produced for growth & repair New cells are identical to the parent cells
Stages of Mitosis Prophase Metaphase Anaphase Telophase PMAT
Review The stage of the cell cycle in which the nucleus divides is known as: Interphase Mitosis Cytokinesis Prophase
Stage 1: Prophase Chromosomes form pairs The centrioles are moving to the poles (ends) Spindle fibers develop The nuclear membrane is breaking down.
Stage 2: Metaphase. The chromatids line up in the middle of the cell They attach to the spindle fibers
Stage 3: Anaphase The chromosomes are pulled apart They move to the opposite side of the cell.
Stage 4: Telophase The Spindle fibers break apart A new nuclear membrane forms Two identical nuclei exist.
Review Which lists the phases of mitosis in order? prophase, metaphase, anaphase, telophase telophase, anaphase, metaphase, prophase metaphase, anaphase, prophase, telophase anaphase, prophase, metaphase, telophase
Stage 3:Cytokinesis The cytoplasm separates Left with two identical cells
Cytokinesis This is the end of the cell cycle Each new daughter cell has the same number of chromosomes as the parent cell!
Summary Mitosis starts with one cell It ends with two identical cells Cells have the same number of chromosomes 3 Stages of Cell Cycle: 1. Interphase 2. Mitosis (Prophase, Metaphase, Anaphase, Telophase) 3. Cytokinesis
Mitosis Video
Make a Cell Cycle Flipbook Stage What happens to chromosomes? What happens in cell? Picture Interphase Prophase Metaphase Anaphase Telophase Cytokinesis