Embedded Files
Introduction: This picture shows onion root tip cells in various stages of the cell cycle.
1,2 - interphase, 3-5 prophase, 6 - metaphase, 7 - early anaphase, 8 - anaphase, 9 - early telophase, 10 - telophase
Directions: Each group will be assigned a microscope photo of an onion root tip listed below. Click on the image to enlarge and count the number of cells in interphase, prophase, metaphase, anaphase and telophase.
Microscope views: A B C D E F G H
- Count the number of cells in your view that are in each of the various stages of mitosis.
- Count only those cells that clearly illustrate a nucleus.
- After submitting your data, examine the data from the entire class.
- Generate a hypotheses about the cell cycle based on the graphs of the class data.
- Submit your hypothesis in the quick write provided
- Discuss your hypotesis in light of the hypotheses of your colleagues
NGSS - Mitosis
- HS-LS1-4. Use a model to illustrate the role of cellular division (mitosis) and differentiation in producing and maintaining complex organisms.
- NGSS Standards
Real-world connections:
Development and growth
The number of cells within an organism increases by mitosis.
Cell replacement
New cells are formed by mitosis and so are exact copies of the cells being replaced. In like manner, red blood cells have short lifespan (only about 4 months) and new RBCs are formed by mitosis.
Page updated
Google Sites
Report abuse