Regulation of the Cell Cycle Asexual Reproduction Cancer.
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Transcript of Regulation of the Cell Cycle Asexual Reproduction Cancer.
a protective section of DNA at the end of each chromosome.
get shorter every time the cell divides.
Cyclin
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Telomeres
When the telomere becomes too short, the cell dies.
Cells that rebuild the telomere with each division can become cancerous
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genetic information is carried in a single, circular chromosome.
DNA is attached at one site to the cell membrane.
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Prokaryotes
much more DNA than Prokaryotes.
genetic information is organized into linear chromosomes.
float freely in the nucleus.
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Eukaryotes
Binary Fission Budding Parthenogenesis Regeneration Rhizomes Spore Formation Cloning
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Asexual Reproduction
Asexual Reproduction in Organisms
Dolly the Cloned Sheep
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How might telomere length be affected in a cloned animal like “Dolly” the sheep?
1. Telomeres might be longer than normal.
2. Telomeres might be shorter than normal.
3. Telomeres might be of normal length.
4. No telomeres would be present.
Binary fission - Bacteria. The circular chromosome duplicates itself and the cell splits into two identical new cells.
Budding - grow directly on the body of the parent. It eventually breaks off and establishes itself as a new, separate organism.
Regeneration - part of the parent's body breaks off and grows into a complete, new organism.
Rhizomes - Some plants (strawberries, potatoes, certain types of grass, etc) form runners that spread out from the parent plant to form plantlets at their ends.
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Asexual Reproduction
Spore formation - fungi and some algae develop into a new organism after dispersal.
Parthenogenesis - the development of an egg that has not been fertilized into an individual. Animals like most kinds of wasps, bees, and ants that have no sex
asexual reproduction are genetically identical copies, or clones, of the parent.
Cloning of mammals
Dolly the sheep
Cloning
Cancer unrestrained cell growth and division
can lead to tumors
second leading cause of death in the United States
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Chemotherapy and radiation affect cancer cells and normal cellsBoth treatments affect cells that are actively dividing.
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