M phase of the cell cycle is where most of the reorganisation takes place so that all of the cells components are moved around. As a cell enters M phase it has two possible fates: the first one is to enter mitosis to produce two diploid genetically identical daughter cells, the second one is to enter meiosis to produce four haploid genetically non-identical daughter cells (Cooper, 2000). There are many similarities and differences between the two that will be covered in this essay. Mitosis is a vital process to ensure the growth and development of an organism and this lasts for about an hour. Mitosis is involved in wound healing and replacing lost cells.
DNA is the molecular instructions of life. It makes anything living common because all living organisms have DNA. DNA come together and form chromosomes after a while. When the cell goes through cell division, the DNA is copied and passed onto the new cell. The DNA structure is very unique.
The first stage is known as the growth stage, this follows cell division and is when cell organelles are synthesised. The second stage is known as the synthesis stage, this is when the DNA replicates. The finally the third stage is known as the 2nd Growth stage and this is when the centrioles replicate and energy stores increase. Prophase In the Mitosis Prophase the chromosomes become visible. Chromosomes are long thread like structures between 0.25 mm and 50 mm long.
It also duplicates a organizing structure called the centrosome. The centrosomes help separate dna during M phase. In G2 phase, the cell grows more and makes more proteins and organelles, and begins to reorganize its contents in preparation for mitosis. G2 phase ends when mitosis begins. The G1, G2, and S phase together is known as interphase.
Mitosis and meiosis both occur in the M phase of the cell cycle, and are the methods of cell division to form somatic cells and gametes, respectively. They are both complex processes that form more than one daughter cell from one parent cell, and they have many similarities and differences, which will be discussed in this essay. Mitosis is the type of cell division that occurs in all somatic cells. Its purpose is to produce two genetically identical daughter cells. Before the process of mitosis starts, DNA replicates and the resulting sister chromatids are held together by cohesin proteins.
During G1 protein and RNA synthesis occurs so that the cell can grow and mature. (Cooper, Geoffrey M) G1 is very important because it controls the rate at which the cell grows and develops. The phase following G1 is the Synthesis phase (S1). The main component of S1 is DNA synthesis. DNA replicates during this phase so that there will be an excess of chromosomes in the cell.
Interphase Prophase Metaphase Anaphase Telophase Analysis Questions 1. During interphase, the cell is carrying out its function as a cell. It continues to grow. The DNA is replicated in preparation for the mitotic phase. During prophase, the chromatin condenses into chromosomes.
This entire process is better known as the gene expression. On a DNA molecule, each gene directs the synthesis of a special type of RNA called messenger RNA. This mRNA molecule works in conjunction with the cell’s protein synthesizing mechanisms to direct the production of a polypeptide chain, which ultimately results in the formation of a protein. Protein synthesis occurs on the ribosomes. However, DNA is found in the nucleus.
When development is complete cell division continues as it is essential to survival. In order for cell division to be productive the genetic material and the nucleus must be twinned accurately and one copy must be distributed to each daughter cell. The copying of the cells genetic information is called DNA replication, nuclear division is called mitosis. Throughout the mitotic(M) phase the cell must undergo mitosis, a process that separates the duplicated chromosomes of a cell into two identical nuclei. It then divides to form two new respective cells during cytokinesis.
DNA and histones combine together to form what is known as chromatin. Once the chromatin is condensed then it will be a chromosome. Mitosis and meiosis both have to replicate the cell’s DNA (Deoxyribonucleic Acid) in order for both processes to commence. DNA is the genetic material inside of the nucleus of the cell, this encodes for RNA: which