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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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Distinguish between Metaphase I and Metaphase of mitosis.

 What is chiasmata ? State its significance.

Why does a multi cellular organism require two types of cell division ?

Why Meiosis II is necessary when cell is divided in Meiosis I ?

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