The Cell Cycle Cell Division Onion Cells Cell

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The Cell Cycle Cell Division

The Cell Cycle Cell Division

Onion Cells

Onion Cells

Cell Division • A cell must divide to: • Grow • Reproduce • Repair

Cell Division • A cell must divide to: • Grow • Reproduce • Repair damaged tissues

The Cell Cycle The cell cycle is how cells grow and divide. 3 parts

The Cell Cycle 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 1. 2. 3. Cell Grows

Stage 1: Interphase • Interphase is the growth stage 1. 2. 3. Cell Grows Genetic material is copied Prepares for division

Interphase makes up most of the cell cycle & takes the longest!

Interphase makes up most of the cell cycle & takes the longest!

Review What is the longest stage of the cell cycle? a. Metaphase b. Interphase

Review What is the longest stage of the cell cycle? a. Metaphase b. Interphase c. Chromophase d. Mitosis

The Genetic Material • All genetic material is found in the nucleus • The

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

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 1. Prophase 2. Metaphase 3. Anaphase 4. Telophase PMAT

Stages of Mitosis 1. Prophase 2. Metaphase 3. Anaphase 4. Telophase PMAT

Review The stage of the cell cycle in which the nucleus divides is known

Review The stage of the cell cycle in which the nucleus divides is known as: a. Interphase b. Mitosis c. Cytokinesis d. Prophase

Stage 1: Prophase • • Chromosomes form pairs The centrioles are moving to the

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

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

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

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? a. prophase, metaphase, anaphase, telophase

Review Which lists the phases of mitosis in order? a. prophase, metaphase, anaphase, telophase b. telophase, anaphase, metaphase, prophase c. metaphase, anaphase, prophase, telophase d. anaphase, prophase, metaphase, telophase

Stage 3: Cytokinesis • The cytoplasm separates • Left with two identical cells

Stage 3: Cytokinesis • The cytoplasm separates • Left with two identical cells

Cytokinesis • This is the end of the cell cycle • Each new daughter

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

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

Mitosis Video

Make a Cell Cycle Flipbook Stage Interphase Prophase Metaphase Anaphase Telophase Cytokinesis What happens

Make a Cell Cycle Flipbook Stage Interphase Prophase Metaphase Anaphase Telophase Cytokinesis What happens to chromosomes? What happens in cell? Picture

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