Cell division is the process that cells go through in order to divide. Cells may divide for several reasons, and there are two types of cell division depending on the purpose. The cell divisionassociated with sexual reproduction is one type, called meiosis. The other type, the celldivision associated with growth and cell replacement or repair, is called mitosis. In both types of cell division, the nucleus splits and DNA is replicated.Three types of cell division cell division, the proliferation of single-celled organisms, the growth of multi-celled organisms, male and female gametes to ensure that the biological event occur.
Amitoz division of cells that extends the kernel, the kernel is divided into two taller, with the nucleolus in the long-drawn boğumlanarak. Following this, the division of the cytoplasm of a cell division occurs to consist of two new puppies. Amitos nuclear envelope is not lost, it does not appear to chromosomes, spindle fibers attach to spindle fibers does not occur. Some special cases outside the highly structured, single-celled organism can be seen in the cells amitoz. In this case, the cells often are sentenced to death, because they can not re-mitosis. Division in cells that degenerate in this organism due to hunger Amitoz sometimes, some of the older cartilage cells, also seen in cells proliferating in the bird embryo blastoderm. Gametes are usually not seen amitoz division. Mitotic cell division is a phenomenon seen in all living things.
The purpose of this event live or in cell division takes place, depending on the cell to form new cells, to ensure renewal and growth. In addition, some organisms, such as eggs and sperm to create sex cells. Prior to the division of a cell, the cell must reach a certain size. Cell division and proliferation of a cell creatures, male and female sex cells, the growth of multicellular organisms required for the occurrence of an event.Mitotic cell division of body cells, including germ cells, to create a meiosis takes place in two different ways.
 |
| Animal Cell Division |
During cell mitosis, as shown in the top division in mitosis through consecutive stages that different to be considered a single-celled growth, is used for multi-celled growth. Healing of injured cells in mitosis and is worn with. Chromosome information consisting of the same cells. During the rapid growth of mitosis. Nerve, the sperm and egg cells, mitosis is not.
During these phases, (Order of Formation stages of mitosis is important), the nucleus and the cytoplasm, consists of dividing the two daughter cells. In the nucleus before cell division and the substance carrying the organism's inherited characteristics (genetic material), a copy is made. This genetic material into structures called chromosomes at the beginning of mitosis. Although significant begin seeing the first stage of mitosis chromosomes. Chromosomes lined up in the middle of the later stages of the cell, the cell moves to the poles of the mutual. Thus, the cells, both chromosomes, so gets a copy of the material of inheritance.
In this way, the division completed the cell nucleus, the cytoplasm is divided. Cytoplasm during the division of animal cell mitosis is completed in half and pinched in two. Plant cell, thereby triggering a structure called the cell middle lamella intermediate cell is divided into two. Mitosis and meiosis, the main cell consists of two daughter cells. Consisting of the main cell with the same number and characteristics of these cells contain chromosomes. Body cells have pairs of chromosomes from the mother and father. If a team chromosome containing cells with "n" is shown. One team (n), the mother, and a team (n) cells contain chromosomes from the father of the two teams to come to "2n" is shown with. For example, number of 2n = 46 chromosomes in human body cells.
So people can say that the body cells of the 23 pairs of chromosomes. Chromosome numbers of living things and there is no correlation between the size and sophistication. From the information in the table with more than the number of chromosomes in living things, for example, the number of chromosomes is 94 sea star can not say that the more advanced people.
Splitting Asexual reproduction Reproduction, reproductive and vegetative budding Rejenerasyonla (Regeneration), Reproduction, Reproductive sports are forms of asexual reproduction. Asexual reproduction occurs by mitosis. Vegetative reproduction of plants branch, leaf parts, such as the occurrence of a new plant, "Vegetative reproduction" is called. Vegetative reproduction occurs only in plants. Cool and cut roses roses and willow branches, formed a new land dikilmesiyle have seen. Example: Rose and Lily willow, potatoes, Tears plant breeding with budding budding form of growth is called the Hydra Hidralarda appear.Projections for the reproduction of the main body and the reproduction is called budding.
Jellyfish, sponges and animals such as multiply budding. Example: Hydra Sponges, Sölenterler, jellyfish, corals and marine animals, such as Brewer's yeast fungi reproduction Splitting Some living things reproduce by dividing. For example, as shown on the photograph reaches a certain size amoeba amoeba dividing amoeba offspring creates self-similar. Puppy-like creatures in the form of wholly happening on the formation of the main life form in this case does not take a role in germ cells. One-celled organisms seen. The most rapid growth is a form. Deterioration of the food one night, as soon as the pool, which is a source of division is a form of
Example: Premasyum, amoeba,Oglena bacteria, algae (one-celled algae) regeneration with (Renewal) breaking off the tail of a lizard's tail Reproductive planarya rebuild, renew starfish meiosis happening on a breakaway arm regeneration events. Regeneration (Regeneration) and reproduction. The location of the cut sample of the liver regeneration Regeneration repair the spalling occurs lizard's tail wound healing, repair broken bones in the sample Planerya regeneration reproduction, earthworm, Starfish, Sponges broken parts creates a separate creature. Many pieces, even when disconnected from earthworm could create a worm that was full of every piece of the bone marrow of humans, did you know that the formation of new blood cells, repair of broken bones, wounds heal over time, is not it also sports a sort of renewal of the above sound reproduction Reproductive sports specialized cells that are covered with a blanket. Best rely on adverse environmental conditions. As conditions become suitable with mitosis to form a new creature.
 |
| Mitosis Cell Division and meiosis Cell Division |
For example: black moss, fern, fungi can be seen from the examples we provide, such as mitosis, a division of living things in the form of body cells. Provides a single-celled outgrowth of growth and innovation while providing multi-celled. Meiosis Main article: Meiosis as a sexual reproducing organisms form gametes zygote modified cells (Gametogenesis) halved the number of chromosomes in meiosis gerçekleşir.üreme the main cells of the reproductive cells in the event of meiosis with the gerçekleşir.Sonuçta cell (gamete) is called.
Meiosis. and II. is in the form of meiosis, in fact, each of which consists of two consecutive divisions. Diploid chromosome number of chromosomes, the main cell division I.mayoz half, down to the haploid state (reduction) occurs in two daughter cells. But I. At the end of meiosis chromosomes chromatids in full has been made yet.
II. meiosis the chromosomes and chromatids fully separated daughter cells are divided lengthwise goes, so that the division is completed. Division in the interphase stage of meiosis (G1, S, G2) is the beginning of I.mayozun, II. mayos not be repeated. I. meiosis, prophase I, metaphase I, anaphase I, telophase I stages of the division of the cytoplasm (cytokinesis) occurs; II. meiosis, prophase II, metaphase II, anaphase II, telophase II stages occurs. This Article was Viewed Read Times.
0 comment:
Post a Comment