Chapter 8: Mitosis - Cell Division and Reproduction
Chapter 8: Mitosis - Cell Division and Reproduction
Chapter 8: Mitosis - Cell Division and Reproduction
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<strong>Cell</strong>s Only Arise from Preexisting <strong>Cell</strong>s<br />
New cells are made through cell division:<br />
• Unicellular organisms (Bacteria, protozoa):<br />
<strong>Division</strong> of one cell into two new organisms through<br />
binary fission or mitosis.<br />
• Multicellular organisms (Plants, animals):<br />
If sexual reproduction:<br />
1. Growth <strong>and</strong> development from zygote or fertilized egg.<br />
Original cell divides by mitosis to produce many cells,<br />
that are genetically identical to first cell.<br />
<strong>Cell</strong>s later develop specific functions (differentiation).<br />
2. <strong>Reproduction</strong> requires:<br />
Meiosis: Special type of cell division that will generate<br />
gametes or sex cells, with 50% of individual’s genetic<br />
material.
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