Cell Growth and Division Question of the Day: Where do new cells come from? Objective: I will be able to explain and demonstrate the steps of Mitosis.

The cell goes through a ______, just like people. Cell cycle- series of events that cells go through as they grow and divide The cell goes through a ______, just like people. G2 phase S phase G1 phase M phase

Mitosis- A process where one cell divides into two cells. Happens in all cells except your sex cells(sperm and egg) Mitosis happens in your ________. One Cell Two Cells

Each chromatid has an identical “sister” part on the chromosome one of two identical “sister” parts of a duplicated chromosome. Each chromatid has an identical “sister” part on the chromosome This chromatid is identical to its sister chromatid Sister chromatid

The centromere is found in the _____ of the _________ area where the chromatids of chromosome are attached The centromere is found in the _____ of the _________

Centrioles are found in the _________. one of two tiny structures located in the cytoplasm of animal cells near the nuclear envelope. Centrioles are found in the _________.

Spindle look like _______; they pull _______ apart. fanlike microtubule structure that help separate the chromosomes during mitosis Spindle look like _______; they pull _______ apart.

Prophase is the ____ stage. The chromosomes make an ________. first and longest phase of mitosis, during which the chromosomes become visible and the centrioles separate and take up positions on the opposite sides of the nucleus. Prophase is the ____ stage. The chromosomes make an ________.

Metaphase is the ______ stage. The chromosomes meet in the ________. second phase of mitosis, during which the chromosomes line up across the center of the cell Metaphase is the ______ stage. The chromosomes meet in the ________.

Anaphase- the third phase of mitosis, during which the chromosome pairs separate and move towards opposite poles Anaphase is the _______ stage. The chromosome pairs _______ and ____ towards opposite end of the cell

10-2 Vocabulary Telophase- fourth and final phase of mitosis, during which the chromosomes begin to disperse into a tangle of dense material Telophase is the ______ stage. The cell starts to __________.

Cytokinesis- division of the cytoplasm during cell division Cytokinesis is the ______ stage. This is where cells are seen as ____ _____.

Okay!!! Show me Prophase

Okay!!! Show me Metaphase

Okay!!! Show me Anaphase

Okay!!! Show me Telophase

Okay!!! Show me Cytokinesis

Prophase Metaphase Anaphase Telophase Cytokinesis

10-2 Cell Division 1. The Cell Cycle a. A cell grows, prepares for division, and divides to form two daughter cells b. The cell cycle includes, four stages i. G1 phase: Gap phase where growth happens ii. Synthesis phase: chromosomes copied & DNA made G2 phase: Gap phase where growth happens Mitosis phase: cell nucleus divides and new cells form

10-2 Cell Division 2. Mitosis is the dividing phase of the cell cycle- there are four steps and one dividing period

Figure 10–5 Interphase Prophase Cytokinesis Metaphase Telophase Section 10-2 Spindle forming Centrioles Chromatin Centromere Nuclear envelope Centriole Chromosomes (paired chromatids) Interphase Prophase Spindle Cytokinesis Centriole Metaphase Telophase Individual chromosomes Anaphase Nuclear envelope reforming Go to Section:

Figure 10–5 Mitosis and Cytokinesis Section 10-2 Spindle forming Centrioles Nuclear envelope Chromatin Centromere Centriole Chromosomes (paired chromatids) Interphase Prophase Spindle Cytokinesis Centriole Metaphase Telophase Individual chromosomes Anaphase Nuclear envelope reforming Prophase: DNA condenses into chromosomes & the nuclear envelope breaks down Go to Section:

Figure 10–5 Mitosis and Cytokinesis Spindle forming Centrioles Chromatin Centromere Nuclear envelope Centriole Chromosomes (paired chromatids) Interphase Prophase Spindle Cytokinesis Centriole Metaphase Telophase Individual chromosomes Anaphase Nuclear envelope reforming Metaphase: Chromosomes line up across the center of the cell

Figure 10–5 Mitosis and Cytokinesis Spindle forming Centrioles Chromatin Centromere Nuclear envelope Centriole Chromosomes (paired chromatids) Interphase Prophase Spindle Cytokinesis Centriole Metaphase Telophase Individual chromosomes Anaphase Nuclear envelope reforming Anaphase: Sister chromatids are pulled to opposite ends of the cell

Figure 10–5 Mitosis and Cytokinesis Spindle forming Centrioles Chromatin Centromere Nuclear envelope Centriole Chromosomes (paired chromatids) Interphase Prophase Spindle Cytokinesis Centriole Metaphase Telophase Individual chromosomes Anaphase Nuclear envelope reforming Telophase: chromosomes loosen up and the nuclear envelope reforms around each cluster of chromatids

Figure 10–5 Mitosis and Cytokinesis Spindle forming Centrioles Chromatin Centromere Nuclear envelope Centriole Chromosomes (paired chromatids) Interphase Prophase Spindle Cytokinesis Centriole Metaphase Telophase Individual chromosomes Anaphase Nuclear envelope reforming Cytokinesis: the cell splits into 2 identical cells

Figure 10–4 The Cell Cycle Section 10-2 G1 phase M phase S phase Go to Section:

Concept Map Cell Cycle Interphase Go to Section: includes M phase (Mitosis) Interphase is divided into is divided into G1 phase S phase Prophase G2 phase Metaphase Telophase Anaphase Go to Section: