10 2 Cell Division Chromosomes Made up of

Chromosomes – Made up of DNA (carries genetic material) l Must be copied before

The Cell Cycle Period of growth in between cell divisions 9. Cell do most

Concept Map Cell Cycle includes G 1 phase Go to Section: Interphase M phase

Mitosis – Dividing of Cell Nucleus l l l Mitosis Prophase Metaphase Anaphase Telophase

Prophase l Prophase (key events) l Spindle fibers Chromosomes become visible Nucleus begins to

Metaphase l The chromosomes line up across the center of the cell (moving along

Anaphase l Chromosomes pulled apart (sister chromatids) until they form two groups near the

Telophase l The nucleus begins to reform around each cluster of chromosomes l Cytokinesis

Mitosis and Cytokinesis Spindle forming Centrioles Nuclear envelope Chromatin Interphase Centromere Chromosomes (paired chromatids)

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10 -2 Cell Division

Chromosomes – Made up of DNA (carries genetic material) l Must be copied before cells can divide l l Before cell division chromosomes become visible. Consists of two identical sister chromatids (copied chromosomes) chromosome 3. Sister chromatids

The Cell Cycle Period of growth in between cell divisions 9. Cell do most of their growing making proteins G 1 phase (grow) M phase 10. Chromosomes copied (DNA) S phase (synthesis) 1. 2. Division of cell nucleus during M phase G 2 phase 11. Organelles required for M phase produced Cell cycle is series of events that cells go through as they grow and divide Go to Section:

Concept Map Cell Cycle includes G 1 phase Go to Section: Interphase M phase (Mitosis) is divided into S phase G 2 phase Prophase Metaphase Anaphase Telophase

Mitosis – Dividing of Cell Nucleus l l l Mitosis Prophase Metaphase Anaphase Telophase Key terms: l Centrioles - structures that make spindle fibers l Spindle fibers – structure responsible for separating chromatids l

Interphase l Chromosomes not visible

Prophase l Prophase (key events) l Spindle fibers Chromosomes become visible Nucleus begins to disappear Spindle fibers are formed from centrioles

Metaphase l The chromosomes line up across the center of the cell (moving along spindle fibers) l

Anaphase l Chromosomes pulled apart (sister chromatids) until they form two groups near the “poles” of the spindle l

Telophase l The nucleus begins to reform around each cluster of chromosomes l Cytokinesis – Division of cytoplasm. l Cell membrane or Cell plate is formed in between nuclei l

Mitosis and Cytokinesis Spindle forming Centrioles Nuclear envelope Chromatin Interphase Centromere Chromosomes (paired chromatids) Prophase Cytokinesis Go to Section: Spindle Centriole Telophase Nuclear envelope reforming Centriole Individual chromosomes Anaphase Metaphase

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