1. Cell Division 3.1 Cell division occurs in all organisms. 3.2
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Cell Division
the BIG idea
Organisms grow, reproduce, and maintain themselves through cell division.
3.1
Cell division occurs in all organisms.
3.2
Cell division is part of the cell cycle.
3.3
Both sexual and asexual reproduction involve cell division.
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2. 3.1 CALIFORNIA Content Standards
Cell division occurs in all organisms.
CALIFORNIA
Content Standards
7.1.c Students know the nucleus is the repository for genetic information in plant and animal cells.
7.2.e Students know DNA (deoxyribonucleic acid) is the genetic material of living organisms and is located in the chromosomes of each cell.
DNA
chromosome
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3. new cells pushed up to fill cut
3.1
Cell division occurs in all organisms.
• In unicellular organisms functions of cell division include reproduction
DNA
chromosome
• In multicellular organisms functions of cell division include growth, development, and repair.
break in skin
dividing cells
new cells pushed up to fill cut
new cell layers
wound is healed
cells stop dividing
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4. Cell division is part of the cell cycle.
3.2
Cell division is part of the cell cycle.
CALIFORNIA
Content Standards
7.1.c Students know the nucleus is the repository for genetic information in plant and animal cells.
7.1.e Students know cells divide to increase their numbers through a process of mitosis, which results in two daughter cells with identical sets of chromosomes.
cell cycle
interphase
mitosis
cytokinesis
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5. Cell division is part of the cell cycle.
3.2
Cell division is part of the cell cycle.
The cell cycle has two main phases, interphase and mitosis. Most of the life cycle of a cell is spent in interphase. During mitosis, the nucleus divides.
cell cycle
interphase
cell grows and carries out normal activities; organelles duplicate
mitosis
cytokinesis
DNA replicates
cell grows and prepares for mitosis
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6. Cell division is part of the cell cycle.
3.2
Cell division is part of the cell cycle.
The cell cycle has two main phases, interphase and mitosis. Most of the life cycle of a cell is spent in interphase. During mitosis, cells divide.
cell cycle
interphase
mitosis
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Match images of cells dividing with the different stages of cell division.
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Watch the process of mitosis in action.
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cytokinesis
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7. Both sexual and asexual reproduction involve cell division.
3.3
Both sexual and asexual reproduction involve cell division.
CALIFORNIA
Content Standards
7.2.a Students know the differences between the life cycles and reproduction methods of sexual and asexual organisms.
asexual reproduction
binary fission
regeneration
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8. Both sexual and asexual reproduction involve cell division.
3.3
Both sexual and asexual reproduction involve cell division.
Some organisms reproduce asexually. Both asexual and sexual reproduction involve cell division.
asexual reproduction
binary fission
Asexual and Sexual Reproduction
regeneration
Asexual Reproduction
Sexual Reproduction
One parent organism
Two parent organisms
Offspring’s genes are identical to parent’s genes
Offspring’s genes are combined from two parents
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Can reproduce quickly
Usually reproduce more slowly
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9. 3.1 Cell division occurs in all organisms.
I. Cell division occurs in all organisms.
DNA
A. Cell division is involved in many functions.
chromosome
B. The genetic material of eukaryotic cells is organized in chromosomes.
1. DNA
2. Chromosomes
C. Cell division is involved in growth, development, and repair.
1. Growth
2. Development
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3. Repair
KEY CONCEPT
SUMMARY

10. Cell division is part of the cell cycle.
3.2
Cell division is part of the cell cycle.
II. Cell division is part of the cell cycle.
cell cycle
A. The cell cycle includes interphase and cell division.
interphase
1. Interphase
mitosis
2. Cell Division Phase
cytokinesis
B. Cell division produces two genetically identical cells.
1. Steps of Mitosis
2. Division of the Cytoplasm
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KEY CONCEPT
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11. Both sexual and asexual reproduction involve cell division.
3.3
Both sexual and asexual reproduction involve cell division.
III. Both sexual and asexual reproduction involve cell division.
asexual reproduction
A. Asexual reproduction involves one parent.
binary fission
1. Cell Division in Unicellular Organisms
regeneration
2. Budding
3. Regeneration
4. Asexual Reproduction and Health
B. Sexual reproduction involves two parent organisms.
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KEY CONCEPT
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12. Image Gallery Click on the icons to see a larger image or animation.
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Match images of cells dividing with the different stages of cell division.
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Watch the process of mitosis in action.
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