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meitosis and mesosis cell divison with all the steps and their explanation?..................................please i need the answer fast please

    • Posted by Pankhuri Sharma 3 years, 11 months ago

    CBSE > Class 09 > Science
    • 2 answers

    Pankhuri Sharma 3 years, 11 months ago

    but aren't there more steps

    0Thank You

    Gaurav Seth 3 years, 11 months ago

    Mitosis

    Meiosis

    Interphase
    Each chromosome replicates. The result is two genetically identical sister chromatids Chromosomes not yet visible but DNA has been duplicated or replicated

    Prophase
    Prophase –Each of the duplicated chromosomes appears as two identical or equal sister chromatids, The mitotic spindle begins to form. Chromosomes condense and thicken Prophase I – crossing-over recombination – Homologous chromosomes (each consists of two sister chromatids) appear together as pairs. Tetrad is the structure that is formed. Segments of chromosomes are exchanged between non-sister chromatids at crossover points known as chiasmata (crossing-over)

    Metaphase
    Metaphase -The chromosomes assemble at the equator at the metaphase plate Metaphase I Chromosomes adjust on the metaphase plate. Chromosomes are still intact and arranged as pairs of homologues

    Anaphase
    Anaphase – The spindle fibres begin to contract. This starts to pull the sister chromatids apart. At the end of anaphase, a complete set of daughter chromosomes is found each pole Anaphase I Sister chromatids stay intact. However, homologous chromosomes drift to the opposite or reverse poles

    0Thank You

    ANSWER
    http://mycbseguide.com/examin8/

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