Why is mitosis and meiosis important in an organism?

Question

what is mitosis and meiosis?

Answer 1

Mitosis is important because without it our cells would not divide.  If our cells are not dividing then we're dead...

Meiosis is ALSO dividing cells, however the cells involved in this particular process are gametes.  Without meiosis, chances are a species would die out.

I could be wrong, it's been a while since i studied this.

Answer 2

mitosis is the division of somatic cells which produce two identical cells.. meiosis on the other hand produces 4 genetically different cells and it is exhibited by s*x cells.. mitosis is important in the regeneration of damaged tissues/cells while meiosis is important in the differentiation of s*x cells

Answer 3

Purple is right. Meiosis and Mitosis may look a bit similar under a microscope but they are totally different. Mitosis is about duplicating (essentially cloning) your cells. Meiosis occurs in the gametes only ( egg and sperm cells). The process of meiosis is about mixing up the genes and no duplication occurs.Mitosis=growth. Meiosis= mixing up the gene pool. Thus meiosis isn't necessary but it helps to fuel evolution by providing variation in the fitness of organisms which is the basis of natural selection.

Answer 4

mitosis helps the organism grow, mieosis helps them reproduce

mitosis creates 2 identical cells

meiosis creates 5 different cells with only half a pair of chromosomes each

Answer 5

............Meiosis is important for the survival of a species. Meiosis is also known as Sexual reproduction. We(Humans) are born by Meiosis. Combination of two sexes(A male and a female). Whereas, Mitosis is important for the development of new cells in the body and also for differentiation to occur. Mitosis is also known as Asexual reproduction. For example: Liver cells are different from the cells in the pancreas. This is because of mitosis. Differentiation took place. However both processes are important. But, there are some unicellular(one- celled) organisms that only reproduce by mitosis. For example: Amoeba. But in Humans both processes are needed. Meiosis is needed for the development of a zygote and mitosis is needed for differentiation of cells and growth of more cells.......Hope that helped!

Answer 6

Meiosis

The genetic information each person carries in his or her cells is a combination of some genetic information from the mother and some from the father. Human cells contain 46 chromosomes divided into 23 pairs. In each pair, one chromosome came from the mother and the other from the father. The genes from the mother are passed to the child in a special cell called an egg. The genes from the father are passed to the child in a special cell called a sperm. Meiosis is the name of the process in which a woman produces eggs or a man produces sperm.



The biological process of creating a child begins in the ovaries of women and the testicles of men, where meiosis takes place. In meiosis, a normal diploid cell (having 2 copies of each chromosome) undergoes a special form of cell division to create haploid gametes (having one copy of each chromosome). The female gamete is called an egg, and the male gamete is called a sperm. When an egg from the mother and a sperm from the father join together, they fuse to form a new diploid cell called a zygote, a process called fertilization. Based on this new arrangement of genetic information, combined from the mother and the father, the zygote develops into a unique individual.

It is necessary to produce haploid cells through meiosis, because if a normal diploid male cell were combined with a normal diploid female cell, the resulting cell would have four copies of each chromosome! Because female cells have two X chromosomes, all eggs have one X chromosome. Male cells, on the other hand, have one X and one Y chromomsome, so each sperm can have either an X or a Y. The gender of the zygote formed depends on the s*x chromosome of the sperm. For a more detailed description and illustrations of meiosis, link to Access Excellence at the National Health Museum.

Mitosis

As descibed above, when a sperm fertilizes an egg, the two cells join together to make the first cell of a developing baby. Mitosis is the name of the process by cells divide to make more cells.



In the first step of mitosis, all the chromosomes are copied, so that instead of two copies, the cell briefly has four copies of each chromosome. Shortly afterwards, the cell divides in half, resulting in two cells (sometimes called daughter cells) which each have a complete copy of all the genetic information. These cells grow larger and eventually also undergo mitosis, making two cells each for a total of four. This process continues many many times to make a human. For a more detailed description and illustrations of mitosis, link to Access Excellence at the National Health Museum.

As there are more and more cells, the cells begin to differentiate, meaning they take on specific characteristics. For example, some cells will differentiate into blood cells. Others become the skin or the bones. This is a very complex process which is controlled mostly by genes. You will recall that there are about 40 000 different genes present in each cell of the body. However, in each part of the body, only some of those genes are expressed (turned on), and the others are silent. For example, in the eye, only genes important for the health and functioning of the eye are expressed.

The area of study which addresses the development of a mature human (or other animal) from a single cell is called embryology or developmental biology.

Why are they important?

mitosis is the process of the chromosomes dividing

steps of mitosis

prophase- chromosomes coil up and become visible

metaphase- the chromosomes move toward the center

anaphase- the cromatids are pulled apart

telophase- a nuclear envelope forms around the chromosomes

it is very essential that cells go through mitosis, so that each new cell contains the same gentic information.

meiosis- is a form of cell division that halves the number of chromosomes in the gametes

meiosis is pretty much the same as mitosis its just that is goes through the process twice

males end up with 4 sperm- process spermatogenisis

females end up with 4 eggs but the other 3 die due to being to small and lacking cytoplasm - process oogenisis

it is also very essential that meiosis occurs, because reproduction would cease.

Answer 7

haha dunno...

they confused me in class.. everyone always get them two mixed up