Part 1:
Hypothesis:
If a model of mitosis is built out of oreo cookies then the oreo model will make it a clear understanding of the similarities and differences of Mitosis and Meiosis.
Materials:
Procedures:
1.Gently twist all of the cookies apart so that you have half of the cookie sides with cream on them and half sides without cream.
2. Each cookie represents a cell; ice cream sprinkles represents chromosome pairs.
3. mix sprinkles(chromosomes) all scrambled in middle of oreo cookie to show interphase
4.sprinkles(chromosomes) are replicated and all must have a pair in order to show prophase
5.line up sprinkles(chromosomes) in middle of the oreo(cell) to demonstrate metaphase
6.Add some space between the sprinkles(chromosomes) as they begin separating and are moved to opposite sides of the(oreo)cell by spindle fibers to show anaphase.
7.Break the oreo(cell) evenly in half with half of the sprinkles(chromosomes)on one side and on the other. This shows that the daughter cells are being pulled apart and telophase in occurring.
8.Get two new complete oreos with frosting evenly on each side and sprinkles evenly on both sides of oreo.This demonstrates the split cytoplasm into 2 cells creating two new daughter cells and this process is cytokinesis.
Analysis Questions:
1. Identify 1 step in your model where a mistake could occur. Describe the consequences of that mistake on the cell and on the organism.
One model that we actually did come across during our cell cycle was we skipped prophase and went straight to metaphase.This caused us to be short on chromosomes and were confused on why our model looked off. The consequence will be that we will have fewer chromosomes and will not divide evenly. We also came across smaller simple mistakes such as our sprinkles breaking,sprinkles hiding in the frosting. These were mistakes but small one that could easily be fixed and replaced.
2.Describe the limitations of your model versus observing this in the real world.
The limitations of our model is the details of the cell since we are using oreos. We cannot really show cell growth as much or the growth or the chromosomes. In the real world there are spindle fibers, nuclear envelopes, poles and details of the cytoplasm.
If a model of mitosis is built out of oreo cookies then the oreo model will make it a clear understanding of the similarities and differences of Mitosis and Meiosis.
Materials:
- box of oreos
- paper towel
- sprinkles
- cup
- camera
Procedures:
1.Gently twist all of the cookies apart so that you have half of the cookie sides with cream on them and half sides without cream.
2. Each cookie represents a cell; ice cream sprinkles represents chromosome pairs.
3. mix sprinkles(chromosomes) all scrambled in middle of oreo cookie to show interphase
4.sprinkles(chromosomes) are replicated and all must have a pair in order to show prophase
5.line up sprinkles(chromosomes) in middle of the oreo(cell) to demonstrate metaphase
6.Add some space between the sprinkles(chromosomes) as they begin separating and are moved to opposite sides of the(oreo)cell by spindle fibers to show anaphase.
7.Break the oreo(cell) evenly in half with half of the sprinkles(chromosomes)on one side and on the other. This shows that the daughter cells are being pulled apart and telophase in occurring.
8.Get two new complete oreos with frosting evenly on each side and sprinkles evenly on both sides of oreo.This demonstrates the split cytoplasm into 2 cells creating two new daughter cells and this process is cytokinesis.
Analysis Questions:
1. Identify 1 step in your model where a mistake could occur. Describe the consequences of that mistake on the cell and on the organism.
One model that we actually did come across during our cell cycle was we skipped prophase and went straight to metaphase.This caused us to be short on chromosomes and were confused on why our model looked off. The consequence will be that we will have fewer chromosomes and will not divide evenly. We also came across smaller simple mistakes such as our sprinkles breaking,sprinkles hiding in the frosting. These were mistakes but small one that could easily be fixed and replaced.
2.Describe the limitations of your model versus observing this in the real world.
The limitations of our model is the details of the cell since we are using oreos. We cannot really show cell growth as much or the growth or the chromosomes. In the real world there are spindle fibers, nuclear envelopes, poles and details of the cytoplasm.
Part 2: Meiosis
Hypothesis:
If a model of Meiosis is build out of oreos then our model should be almost the same as our mitosis model except we should end up with 4 oreos and we will learn more about the differences and similarities of mitosis and meiosis.
Procedures:
1.Gently twist all of the cookies apart so that you have half of the cookie sides with cream on them and half sides without cream. Each cookie represents a cell; ice cream sprinkles represents chromosome pairs.
2. Prophase: Here chromosomes are shortening and thickening
3.Metaphase: mix sprinkles(chromosomes) all scrambled in middle of oreo cookie and begin crossing over to show interphase
4.Anaphase: sprinkles(chromosomes) homozygous pairs move closer to the middle of the cell (equator)
5.Telophase: Chromosomes move to the opposite sides of the poles
6.Prophase 2: chromosomes gather at poles and cytoplasm divides again
7.Metaphase 2: new spindles form around chromosomes
8.Anaphase 2: Chromosomes line up at equator
9.Telophase:centromeres divide chromatids and move to opposite poles of cells
10.Cytokinesis 2: nuclear envelopes forms around each set of chromosomes
Analysis Questions:
- Identify 1 step in your model where a mistake could occur. Describe the consequences of that mistake on the organism's possible progeny.
2.Compare and Contrast the process of mitosis and meiosis.
The similarities is they both produce daughter cells from a parent cell. Differenties is meiosis goes thru two cell divisions as for mitosis only goes through one time.Also Mitosis goes through one cycle including interphase and on the other hand, Meiosis goes through two cycles with only one process of interphase.In Meiosis daughter cells are not identical but in mitosis the daughter cells are identical to parent. Lastly, crossing over only occurs during Meiosis.
Conclusion:
To conclude about my hypothesis of our “Oreo Lab” my partner and I did get to know a little bit more about cell division. I proved my hypothesis as I tested it out and did come to the conclusion about learning more about the similarities and differences about Mitosis and Meiosis.We were able to express our knowledge about mitosis and meiosis in the use of oreos and sprinkles.We had a few troubles with the sprinkles breaking and trying to keep the frosting from getting too messy. Although this was the case we still had fun and it allowed for us to build a model in a fun educational way.