Cell Division Cell Division Mitosis dividing the cells

Cell Division

Cell Division • Mitosis – dividing the cell’s nucleus into two identical nuclei • Cytokinesis – dividing the cell’s cytoplasm to make two daughter cells

Stages of Mitosis • • Prophase Metaphase Anaphase Telophase

Prophase • Chromosomes condense and become visible

Prophase • Centrioles move to opposite sides of the cell

Prophase • Mitotic spindle forms and attaches to the centromeres of the chromosomes

Prophase • Nuclear membrane breaks down and disappears

Metaphase • Chromosomes line up in the middle of the cell

Anaphase • Centromeres divide pulling the sister chromatids apart

Anaphase • Each end of the cell has a complete set of daughter chromosomes

Telophase • Nuclear membrane forms around each set of chromosomes

Telophase • Chromosomes uncoil and become loose chromatin

Telophase • Mitotic spindle disappears

Cytokinesis in animal cells • Cleavage furrow – cell membrane folds inward • Pinches off its membrane to form two new cells

Cytokinesis in plant cells • A cell plate forms between the two ends of the cell • The plate forms a new cell membrane and cell wall creating two new cells

• http: //www. youtube. com/watch? v=e. Fu. CE 22 a gy. M

A look in animal cells

A look in plant cells

What phase is this?

What phase is this?

What phase is this?

What phase is this?

What phase is this?

Let’s try it with real slides

What phase is this?

What phase is this?

What phase is this?

What phase is this?

What phase is this?

Know what happens during each phase! Interphase Prophase Metaphase Anaphase Telophase Cytokinesis

interphase prophase anaphase telophase metaphase cytokinesis • Centromeres divide pulling the sister chromatids apart

interphase prophase anaphase telophase metaphase cytokinesis • A cell plate forms between the two ends of the cell

interphase prophase anaphase telophase metaphase cytokinesis • Chromosomes uncoil and become loose chromatin

interphase prophase anaphase telophase metaphase cytokinesis • Chromosomes condense and become visible

interphase prophase anaphase telophase metaphase cytokinesis • Nuclear membrane breaks down and disappears

interphase prophase anaphase telophase metaphase cytokinesis • Chromosomes line up in the middle of the cell

interphase prophase anaphase telophase metaphase cytokinesis • Takes up 90% of total time in cell cycle

interphase prophase anaphase telophase metaphase cytokinesis • Nuclear membrane forms around each set of chromosomes

interphase prophase anaphase telophase metaphase cytokinesis • Mitotic spindle forms and attaches to the centromeres of the chromosomes

interphase prophase anaphase telophase metaphase cytokinesis • Pinches off its membrane to form two new cells

interphase prophase anaphase telophase metaphase cytokinesis • Mitotic spindle disappears

interphase prophase anaphase telophase metaphase cytokinesis • Centrioles move to opposite sides of the cell