Cell growth & Reproduction
In the following chapter, I will help prepare you for keystone testing by teaching you the subjects, Cell Growth & Reproduction. Cells are an interesting part of life. All multicellular organisms start as a single cell. Cells are the basic components of life. The first subject that you will be learning from is the Cell Cycle, Mitosis and Cell Reproduction. The main steps of the cell cycle is cytokinesis, interphase and finally nuclear division. When nuclear division occurs, it usually results in the division of the cell. The cell divides to take the place of dead or damaged cells. Without the process of a cell dividing, humans would not be able to grow past a single cell organism.
Essential Questions
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What events occur during the Cell Cycle?
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How does DNA replication transmit and conserve genetic information?
Objectives- What do you gain?
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Describe the cell cycle in organisms
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Explain DNA replication
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Create comparisons between key terms
The Cell Cycle
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1.Telophase-
The nuclear membrane forms and gets ready for division
2. Interphase-
The growth and development of the cell
3. Prophase-
The chromatids pair up; nuclear membrane dissolves & centrioles & spindle fibers go to opposite ends.
4.Anaphase-
The chromosomes separate by the spindle fibres pulling them apart.
5.Metaphase-
The paired chromatids (chromosomes) line up in the center of the cell.
Extra Key Information
Mitosis and Cellular Growth
-Each multi-cell organism starts off with 1 cell that divides until trillions of cells come about.
-Cell division keeps going on and on until the organism dies.
-Cells have 3 stages of life
Key words
Cell cycle
- Cells going through the process of multiplying and dividing
Interphase
- A growth phase in the cell where it increases in size and duplicates chromosomes
Mitosis
- A single cell that divides into 2 other cells
Cytokinesis
- Cytoplasm dividing after meiosis or mitosis
Meiosis
- Cell division used for reproduction
Eukaryotic
- Organisms with multiple cells
Representations of Mitosis
It's Your Turn!
Questions
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In what phase do the chromatids link up?
a.Metaphase c. Telophase
b .prophase d. Interphase
2. What is a Eukaryotic Organism
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A mammal C. A zygote
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A single celled organism D. An organism with multiple cells
Chromosomes duplicate during the interphase
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True
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False
What is the final step in the cell cycle?
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What is the difference between meiosis and mitosis?
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Answer Key
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In what phase do the chromatids link up?
b .Prophase
During the prophase, the chromatids pair up; nuclear membrane dissolves & centrioles & spindle fibers go to opposite ends.
2. What is a Eukaryotic Organism
C. A zygote
Though a mammal and a zygote both have multiple cells, but the scope of a Eukaryotic organism is more than that. A eukaryotic organism is any organism that has multiple cells.
Chromosomes duplicate during the interphase​
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False
During the interphase, the cell grows and prepares for duplication.
What is the final phase of the cell cycle? What happens?
_________The final phase of the cell cycle is Cytokinesis, where the cell divides into two ____________________________________________________________________________________________
What is the difference between Mitosis and Meiosis
In mitosis 1 cell divides itself into 2 cells. In meiosis, the cell 4 cells form that have have half of the parent cell’s chromosomes in them.
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