The Mitosis

AGUSTINIANO CIUDAD SALITRE SCHOOL
THE MITOSIS
SUBJECT: Biology
TEACHER: Jenifer Garcia
GROUP:
1. Sebastian Marin
2. Johan Leon
3. Nicolas Parra
4. Juan Felipe Zamudio
5. Juan Jose Montenegro
The mitosis
7-B
2012
Mitosis is a form of cellular reproduction in which the parent cell divides, giving rise to two daughter cells that are genetically identical to each other, and to the parentcell. Mitosis does not involve combining genetic information from two different parents; it is a form of asexual reproduction. It occurs when an organism grows, or when damaged or worn cells are replaced. When mitosis occurs one cell becomes two and each new cell will need a set of genes.

EUKARYOTIC CELLS
Eukaryotic cells are those having a defined nucleus through nuclear membrane, incontrast to prokaryotes lack this nuclear membrane, whereby the genetic material is dispersed therein (in cytoplasm), which is perceptible by single the electron microscope. A bodies formed by eukaryotic cells are called eukaryotes. 
INTERPHASE
It is the stage prior to mitosis where the cell prepares to divide, in this, the centriole and chromatin are duplicated the chromosomes which are doubles are.The first process is key to that is nuclear Division is all strands of DNA duplication (DNA replication); This occurs immediately before the commencement of the division, in a period of the cell cycle called interphase, which is the time of cellular life in that it has not is dividing.
After replication, you will have two sets of DNA, so mitosis consist of separate those chains and bring them tothe daughter cells. To achieve this is given another crucial process which is the conversion of the chromatin into chromosomes.

PROPHASE
This is the stage that begins mitosis, therein, the following events occur:
Begins with the conversion of chromatin into chromosomes (1) by a process of spiralisation of the chains (like if we have a long wire and turn it into a spring), will continue tohave the same, but in a different way: two strings that are completely identical (since one has been shaped by the other replication) are espiralizan together causing the sister chromatids of a chromosome.
Doubled the centrioles (2).
The nuclear membrane disappears (3).
When the nuclear membrane is already gone, the centrioles migrate towards the Poles (ends) of the cell (4), appearing between thetwo pairs of centrioles a series of arranged from pole to pole protein fibers called spindle apparatus (5) altogether.
Already formed chromosomes move and join a spindle fiber by the centromere (a chromosome only by fiber) (6), so the sister chromatids to migrate towards the poles of the cell. There are no centrioles in plant cells and sometimes is not the spindle apparatus.

ANAPHASE
Thesister chromatids are separated by the centromere and move to the centrioles at the time that the spindle fibers are disappearing. At this time already the hereditary material (DNA strings) has distributed identically in two parts. Now the sister chromatids are called chromosomes. Anaphase is the crucial phase of mitosis, by which it is carried out the distribution of the two copies of the originalgenetic information.
METAPHASE
A brief phase is in which all the double chromosomes are located in Ecuador (middle part) of the cell, forming a very characteristic figure called Equatorial plate (1). After you place here begins the next phase.

TELOPHASE
It is a prophase upside down, rebuild the nuclear membranes and reappear the nucleoli of the daughter cells. Chromosomes are disorganized toagain form the molecule of chromatin. Finally, the cell membrane begins to separate the two new nuclei, ending the process of mitosis. In many cells mitosis is often accompanied by cytokinesis or separation of the cytoplasm of the daughter cells.

CYTOKINESIS
It is the second stage of mitosis, in this companion, the cytoplasm divides to form two cells identical diploid daughters with the...