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Meiosis and Mitosis; General Information And Differences

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AP Biology Test Review

We are doing a mitosis and meiosis lab. I need help on these concept questions.

1. Why is it more accurate to call mitosis "nuclear replication" rather than "cellular division"?

2. Explain why the whitefish blastula and onion root tip are selected for a study of mitosis.
3. List three major difference between the events of mitosis and meiosis.
4. Compare mitosis and meiosis with respect to each of the following:
Mitosis Meiosis
Chromosome number of parent cells
Number of DNA replications
Number of divisions
Number of daughter cells produced
Chromosome number of daughter cells
purpose

5. How are Meiosis I and Meiosis II dufferent?
6. How do oogenesis and spermatogenesis differ?
7. Why is meiosis important for sexual reproduction?

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1. Why is it more accurate to call mitosis "nuclear replication" rather than "cellular division"?

Mitosis is not division of the cell. That is cytokinesis. Mitosis is division of the nucleus, i.e. chromosomal division. Sometimes a cell undergoes mitosis without cytokinesis. Such an event produces a multinucleated cell.

2. Explain why the whitefish blastula and onion root tip are selected for a study of mitosis.

Whitefish blastula is a very good model for studying animal mitosis. A blastula is an early stage of embryonic development. Therefore, a prepared slide of a blastula shows lots of nuclei undergoing mitosis. All of the different phases of mitosis can be seen. Likewise for the onion root tip. Roots grow from their tips. Therefore, the tip of an onion root is a great place to look to spot nuclei undergoing mitosis. All of the different stages of mitosis can be ...

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