Why is meiosis essential in sexually reproducing organisms ? from
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    Cell Cycle and Cell Division

    Multiple Choice QuestionsShort Answer Type

    31.  What is chiasmata ? State its significance.
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    32. Why is meiosis essential in sexually reproducing organisms ?

    Meiosis is the reduction division which  reduces the number of chromosomes to half in gametes formed in sex organs. Thus it is necessary for attaining haploid number of chromosomes in gametes. These gametes then fuse and restore the chromosome number in the organisms. Thus, meiosis is necessary for the maintenance of chromosome number.
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    33. How does cytokinesis in plant cells differ from that in animal cells?
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    34. Distinguish between Metaphase I and Metaphase of mitosis.
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    Multiple Choice QuestionsLong Answer Type

    35. Draw diagram of mitosis.
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    36. Draw the diagram of meiosis.
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    Multiple Choice QuestionsShort Answer Type

    37. What is the average cell cycle span for a mammalian cell ?
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    38. Can there be mitosis without DNA replication in ‘S’ phase ?
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    39. Can there be DNA replication without cell division.
     
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    40. Distinguish between cytokinesis and karyokinesis.
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