Meiosis Homework

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Mitosis and Meiosis|
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Tamara Carter|
2/9/2012|

Unit 7 Writing Assignment 1 Mitosis and Meiosis|

Key|
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| Mitosis| Meiosis|
Which Cells| All cells with the exception of reproductive cells| Only happens to reproductive cells (sperm, eggs)| Phases of Division| Interphase, Prophase, Metaphase, Anaphase, Telophase, and Cytokinesis| Interphase, Prophase 1, Metaphase 1 , Anaphase 1, Telophase 1, Cytokinesis 1, Prophase 2, Metaphase 2, Anaphase 2, Telophase 2, and Cytokinesis 2 | Number of Divisions| 1| 2|

End Number of Cells| 2| 4|
Number of Chromosomes| 46| 23|
Name of End Cells| Daughter Cells| Gametes|

The reason the products of meiosis are not always identical is because “each gamete has its own unique new combination of genetic material” (Trefil & Hazen, 2010).It is in the second stage where one of the maternal copied chromosomes hooks up with one of the paternal copied chromosome and exchange short chains of genetic material making up an whole new type of chromosome. Thus the new gametes will always differ from the original cells. This process keeps everyone from being exactly the same person. That is how we get our different traits (such as hair color, skin color, eye color, personalities, and sometimes birth defects). It is also through this process that a once “weak” characteristic can change and become a “strong” characteristic or vise versa. It is good because then through the generations our bodies can adapt to changes and our offspring will be able to perform better than their parents or grand-parents.

Works Cited
Trefil, J., & Hazen, R. (2010). The Sciences 6th Edition. Hoboken: John Wiley & Sons, Inc.
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