Cell Division
CHAPTER
the BIG ideathe BIG idea
CHAPTER OUTLINE
Organisms grow, reproduce, and maintain themselves through cell division.
Cell division occurs in all organisms.3.13.1
Cell division is part of the cell cycle.3.23.2
Both sexual and asexual reproduction involve cell division.3.33.3
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3.13.1
SECTION OUTLINESECTION OUTLINE
Cell division occurs in all organisms.
chromosome
DNA
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CALIFORNIAContent 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.
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KEY CONCEPT CHAPTER HOME
3.13.1
SECTION OUTLINESECTION OUTLINE
Cell division occurs in all organisms.
• In unicellular organisms the function of cell division is reproduction. One cell splits into two!
• 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
chromosome
DNA
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KEY CONCEPT CHAPTER HOME
I. Cell division occurs in all organisms.
A. Cell division is involved in many functions.
B. The genetic material of eukaryotic cells is organized in chromosomes.
2. Chromosomes
3.13.1
KEY CONCEPTSUMMARYKEY CONCEPTSUMMARY
1. DNA
Cell division occurs in all organisms.
C. Cell division is involved in growth, development, and repair.
2. Development
1. Growth
chromosome
DNA
3. RepairCHAPTERRESOURCESCHAPTERRESOURCES
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KEY CONCEPT CHAPTER HOME
Cell division is part of the cell cycle.3.23.2
SECTIONOUTLINESECTIONOUTLINE
interphase
mitosis
cell cycle
cytokinesis
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CALIFORNIAContent 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.
VOCABULARY
KEY CONCEPT CHAPTER HOME
Cell division is part of the cell cycle.3.23.2
SECTIONOUTLINESECTIONOUTLINE
interphase
mitosis
cell cycle
cytokinesis
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 grows and carries out normal activities; organelles duplicate
DNA replicates
cell grows and prepares
for mitosis
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KEY CONCEPT CHAPTER HOME
II. Cell division is part of the cell cycle.
A. The cell cycle includes interphase and cell division.
B. Cell division produces two genetically identical cells.
3.23.2
KEY CONCEPTSUMMARYKEY CONCEPTSUMMARY
1. Interphase
2. Cell Division Phase
Cell division is part of the cell cycle.
1. Steps of Mitosis
2. Division of the Cytoplasm
interphase
mitosis
cell cycle
cytokinesis
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Cell division is part of the cell cycle.3.23.2
SECTIONOUTLINESECTIONOUTLINE
interphase
mitosis
cell cycle
cytokinesis
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.
VISUALIZATION
Watch the process of mitosis in action.
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Match images of cells dividing with the different stages of cell division.
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3.33.3
SECTIONOUTLINESECTIONOUTLINE
Both sexual and asexual reproduction involve cell division.
binary fission
asexual reproduction
regeneration
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CALIFORNIAContent Standards
7.2.a Students know the differences between the life cycles and reproduction methods of sexual and asexual organisms.
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KEY CONCEPT CHAPTER HOME
Asexual and Sexual Reproduction
3.33.3
SECTIONOUTLINESECTIONOUTLINE
Both sexual and asexual reproduction involve cell division.
binary fission
asexual reproduction
regeneration
Some organisms reproduce asexually. Both asexual and sexual reproduction involve cell division.
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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
Can reproduce quickly Usually reproduce more slowly
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KEY CONCEPT CHAPTER HOME
III. Both sexual and asexual reproduction involve cell division.
A. Asexual reproduction involves one parent.
B. Sexual reproduction involves two parent organisms.
1. Cell Division in Unicellular Organisms
2. Budding
3.33.3
KEY CONCEPTSUMMARYKEY CONCEPTSUMMARY
Both sexual and asexual reproduction involve cell division.
binary fission
asexual reproduction
regeneration
3. Regeneration
4. Asexual Reproduction and Health
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VISUALIZATION
Watch the process of mitosis in action.
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Match images of cells dividing with the different stages of cell division.
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