Tuesday, August 30, 2011

3.24c stages of mitosis

the nucleus of the cell contains the chromosomes, during the resting stage of the cell cycle known as the interphase the chromosomes are copied in  a process known as DNA replication, this process creates two copies of each chromosome which are held together by a structure known as the centromere.

stages of mitosis includes ::
the nucleus membrane breaks down in the process of cell division, called prophase. chromosomes become visible as a pair of chromatids.
a network of of protein molecules appear called spindles the chromosome will move towards the spindle during the late prophase and will move finally join onto a spindle fibre at the centromere known as the metaphase, in this phase the chromosomes are in the middle arranged across the equator of the cell.
the next phase is the amaphase where the spindle fibre shortens so the chromatids gets pulled apart to opposite poles of the cell.
telophase is the end of mitosis where the nucleus begins to reform around the chromosomes at the end of the phase two nuclei are formed at opposite ends of the cell.
cytokinesis is not considered a stage of mitosis but it is where the cell splits to form two cells, each with one chromosome in, identical to the parental cell.

1 comment:

  1. Two things:

    1. reduce the text to bullet points
    2. Add images

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