What Is the Purpose of Mitosis?

What Is the Purpose of Mitosis?

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7 months ago
Mitosis is a process where a single cell divides into two identical daughter cells (cell division). During mitosis one cell? divides once to form two identical cells. The major purpose of mitosis is for growth and to replace worn out cells.
7 months ago
​In 1887, the German anatomy biologist, Water Fleming, coined the term mitosis which comes from the Greek language and translates to “wrap thread” from mitos and “act or process” from the osis part of mitosis. This term was based on the warped thread appearance of the chromatin of the cell nucleus in the first stages of mitosis. Now, what is mitosis as a process? Mitosis is the process in cell division by which the nucleus of the cell divides (in a multiple phase), giving rise to two identical daughter cells.
Mitosis happens in all eukaryotic cells (plants, animals, and fungi). It is the process of cell renewal and growth in a plant, animal or fungus. It is continuously occurring throughout our bodies; it is even happening while you are reading this. Cells continuously die; this process is termed apoptosis (programmed cell death). For you to stay alive and fully functional, these cells need to be continuously replaced. Mitosis is crucial to this process. Mitosis is the reason we can grow, heal wounds, and replace damaged cells.
Mitosis is also important in organisms which reproduce as*xually: this is the only way that these cells can reproduce. This is the one key process that sustains populations of as*xual organisms. Mitosis allows for some organisms to main alternating life stages (as*xual and s*xual, such as fungi).
The key to mitosis occurring is the presence of a nucleus. Therefore, organisms without nuclei (prokaryotes) miss out on this impressive process.
Before Mitosis
Before mitosis begins, the chromosomes in the nucleus of the cell undergo replication. This is because mitosis produces two daughter cells identical to the parent cell; so the number of chromosomes in the parent and daughter cells must be the same. Mitosis produces two diploid cells from one diploid cell. Thus, chromosome numbers must double before mitosis occurs. Keep in mind; diploid refers to the number of chromosomes in a cell: haploid cells have one set of chromosomes (n), as is found in a gamete (s*x cell), whereas diploid cells have two sets of chromosomes (2n).
Overview of Mitosis
During mitosis, all chromosomes separate into chromatids (the two halves of a chromosome). These chromatids are then separated in space before cell division, to form the chromatic makeup of each daughter cell. Because there are double the number of diploid chromosomes in the parent cell (2 X 2n = 4n), when these chromosomes are separated into their chromatids and split into two groups, each group will have the same number of chromatids, and therefore chromosomes, as each other and as the parent cell. The composition of these chromosomes will also be identical. Once the chromosomes are separated in space, cell division occurs to produce two daughter cells. Thus, mitosis uses chromosome replication to produce two identical diploid daughter cells, which are genetically identical to the diploid parent cell. This way all your cells have identical DNA composition.
The Phases of Mitosis
The process of mitosis can be mind boggling to grasp fully; here we will try to work through it systematically. First off, mitosis can be split into 5 phases: Prophase, prometaphase, metaphase, anaphase and telophase. Some textbooks vary in the number of phases. In some instances they do away with prometaphase and just keep the four fundamental phases.
What exactly happens in each phase of mitosis in animals may differ to what happens in plants. Nonetheless, all cells undergoing mitosis will in one way or another undergo each of the above mentioned phases.
You will need to familiarize yourself with the following terms to fully understand the phases of mitosis explained below:
7 months ago
The purpose of mitosis is cell reproduction,
regeneration and growth. Mitosis is cell
division that occurs in the nucleus of a cell.
The result of mitosis is the formation of two
cells, called daughter cells, that are
genetically identical to the original cell.
The first purpose of cell mitosis is the
reproduction or growth of new, identical
cells. The second purpose of mitosis is the
repair of cells that are damaged due to
normal aging.
There are five phases of mitosis: interphase,
prophase, metaphase, anaphase and
telophase. During interphase, chromosomes
inside the cell replicate into an identical
copy. In prophase, chromosome replication
is visible. The chromosomes have shortened
and are attached to each other.
Metaphase occurs when the chromosomes
are aligned in the center of a cell, and
spindle fibers form and attach to each pair
of chromosomes. Anaphase mitosis occurs
when paired chromosomes split at the
centromere, or the point on the
chromosome where the spindle fibers
attach. The cell then begins to divide.
Telophase is the final stage of mitosis, in
which cell division occurs and forms two
cells identical to the original cell. These cells
then revert to interphase mitosis and begin
the process of cell division again.
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