Mitosis and Meiosis

Last update by mayur on 03/27/2014
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Discuss the importance of crossing-over and independent assortment.


Crossing-over and Independent assortment promote variation. During prophase of meiosis, crossing-over results in chromosomes that have some genes from one parent and some genes from the other parent.

Individuals contain two sets of each chromosome but gametes contain only one set. For each homologous pair of chromosomes, one chromosome will be randomly selected for each gamete formed (independent assortment).

Variation is neccesary for natural selection!

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    Compare meiosis I with mitosis. Tell how they are similar and how they how they are different. Compare meiosis II with mitosis.

    mitosis: prophase, metaphase, anaphase, telophase.
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    meiosis 2: prophase 2, metaphase 2, anaphase 2, and telophase 2

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    The second meiotic division is like mitosis; the number of chromosomes does not get reduced.

    The events that occur during meiosis II are similar to mitosis

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    What happens between the divisions of meiosis?
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    What is the advantage of sexual reproduction?

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Mitosis and Meiosis
Mitosis and Meiosis
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