Lab Discussion

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Ty Yarbrough


The purpose of this lab was to recognize the stages as well as events of mitosis and meiosis in a plant cell or an animal cell. The relative duration of each stage in the cell cycle will also be learned during this lab. By doing this lab we will also create a model of and understand the process of crossing over. This lab also helps students understand the similarities along with differences between mitosis and meiosis.   Purpose

The objectives of the lab were to help give us a better understanding of cell cycles and divisions. Methods/Procedure
5.2 Meiosis: First we obtained forty-eight red pop beads and forty-eight blue ones for a total of ninety-six. Then we used these to build a homologous pair of duplicated chromosomes each having 16 beads. Then we built a duplicate pair to match with each chromatid consisting of only eight beads. The red chromosomes are symbols of being from one parent while the blue from the other parent. Results

5.3 Differences between Mitosis and Meiosis

Table 5.3| Mitosis| Meiosis|
1. Number of divisions| 1| 2|
2. Chromosome number in daughter cells| 46| 23|
Number of daughter cells| 1| 2|

The blue chromosomes were inherited from one parent, and the red chromosomes were inherited from the other parent. The exchange of color between nonsister chromatids represents the crossing-over that occurred during meiosis. During meiosis homologous pairs align independently whereas during mitosis chromosomes align dependent. Conclusion

In this lab I have learned that Mitosis produces 2 daughter cells that are identical to the parent cell. Meiosis produces daughter cells that have 1/2 the number of chromosomes as the parent cell. It can be concluded that Mitosis and Meiosis have similarities and differences. However, both Mitosis and Meiosis are both types of cell division and each begin with a duplicate set of chromosomes.
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