Cell Division 7 th grade. Cell Division Animal Cell Plant Cell Photographs from: .
INTRO TO CELL DIVISION
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Transcript of INTRO TO CELL DIVISION
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INTRO TO CELL DIVISION
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Organisms can reproduce…• _____________________
• ______________________
- simple cell division - cell duplicates genetic material
- two parents
- 2 new genetically identical cells
- genetic material from each parent combine
- genetically different offspring
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Roles of cell reproduction
• Replacement of _____ or ______ cells
• _____________
• Production of ______________
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THE CELL CYCLE
* Events from “birth” of eukaryotic cell to when it reproduces
* How ________ a cell divides depends on the type of cell it is.
_____________: muscle cells, nerve cells (neurons), and liver cells
______________: cells that line stomach and mouth, skin cells
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Before cell division…INTERPHASE
• Cell carries out __________________and performs functions
• Up to ___________of cell the cell cycle is spent in interphase
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______________ phase
- cell s the # of organelles
- protein synthesis
- cell grows and carries out cellular functions
______________ phase
- continued growth and metabolism
______________ phase
- DNA duplicates
- protein synthesis
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CHECKPOINT #1 (after G1)
1) Enough growth?
2) Need for new cells?
3) DNA undamaged?
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CHECKPOINT #2 (after G2)
1) DNA replicated?2) Enough growth?
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M (mitotic) PHASE
• Cell actively _______________
• ________________ and ________________
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Terms• Chromatin – • Chromosomes – • Diploid cells –
• Haploid cells –
• Homologous Chromosomes –
• Genes –
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PROPHASE
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METAPHASE
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ANAPHASE
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TELOPHASE
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• Cells in a cancerous tumor ____________at an abnormally fast rate and become irregular in appearance.
• When individual cells ___________(travel from the original tumor), the cancer can spread.