1. Cell Cycle (Mitosis) Mr. Alvarez 7th grade Health Mr. Alvarez 7th grade Health

2. California State Standard Cell Biology (Mitosis)  1. All living organisms are composed of cells.  e. cells divide to increase their numbers through a process of mitosis, which results in two daughter cells with identical sets of chromosomes.  1. All living organisms are composed of cells.  e. cells divide to increase their numbers through a process of mitosis, which results in two daughter cells with identical sets of chromosomes.

3. Cell Cycle 6 phases / Interphase / Prophase / Metaphase / Anaphase / Telophase / Cytokinesis / Interphase / Prophase / Metaphase / Anaphase / Telophase / Cytokinesis Phases of Mitosis

4. The Complete Cell Cycle

5. Chromosome Structure Centromere

6. Chromosome Structure 1 chromatid So 1 chromatid + 1 chromatid = 1 Chromosome

7. Interphase THE CELL:  grows to it ’ s mature size / makes a _____ of its DNA / prepares to _______ into two cells THE CELL:  grows to it ’ s mature size / makes a _____ of its DNA / prepares to _______ into two cells Copy Divide

8. The DNA condenses

9. Prophase / the __________ condenses (gets thicker) to form chromosomes, which are two chromatids attached by a ____________. / _______ fibers stretch out to opposite ends of the cell / the nucleus breaks down / the __________ condenses (gets thicker) to form chromosomes, which are two chromatids attached by a ____________. / _______ fibers stretch out to opposite ends of the cell / the nucleus breaks down Chromatin Centromere Spindle

10. Metaphase / the __________ line up in the middle of the cell / spindle fibers attach to the __________ of the chromosomes / the __________ line up in the middle of the cell / spindle fibers attach to the __________ of the chromosomes Chromosomes Centromere

11. Anaphase / ____________ split and the chromatids separate / chromatid to opposite ends of the cell being pulled by the ___________ / the cell begins to become stretched out / ____________ split and the chromatids separate / chromatid to opposite ends of the cell being pulled by the ___________ / the cell begins to become stretched out Centromeres Spindle Fibers

12. Telophase  the __________ reappears – two nuclei but one cell / chromosomes begins to loosen up (start to become string again)  the __________ reappears – two nuclei but one cell / chromosomes begins to loosen up (start to become string again) Nucleus

13. Cytokinesis / the cell divides and two new ___________ cells are formed / chromosomes loosen up and become chromatin again / the cell divides and two new ___________ cells are formed / chromosomes loosen up and become chromatin again Daughter