The cell cycle is vital for the reproduction of many cells, which is sequence of occurrences that form to cell division. It is necessary to understand this process in order to prove the proposals that German biologist, Rudolf Virchow, presented in 1858. Virchow stated, “Every cell originates from another cell,” this means that the cells that are living at this moment must have came from other cells and came out spontaneously.
The cell cycle can be broken down into five phases, G0, G1, S, G2, and M phases. The G0 is the phase that a cell has deferred the choice to divide. This is basically a substitute to the G1 phase, so in a sense the G0 phase is the non-dividing part of the cell’s life. The G1 phase of the cell cycle is when the cell has become dedicated to dividing, and this is when cell usually grows. The S phase is when the cell’s chromosomes are copied to form pairs of sister chromatids. After this phase is done, the cell will have the double amount of chromatids as the original number of chromosomes in the G1 phase. After the S phase, the cell is ready to enter the G2 phase during which the cell begins to create proteins required for the assortment of chromosomes and cell division. The last phase in the cell cycle is the M phase that can be split in to two parts, mitosis and cytokinesis.
Mitosis is a process that some cells go to reproduce and create two new daughter cells from one-parent cells, meaning that the cell has gone through asexual reproduction. This process has six phases, which are interphase, prophase,, prometaphase, metaphase, anaphase, and telophase & cytokinesis. During interphase, the cell has begun to replicate the chromosomes in the cell nucleus and is not condensed. Mitosis begins with...
... middle of paper ...
...ng that one cell will become two daughter cells. It begins with interphase when the parent cells chromosomes duplicate and then followed by prophase, when the nuclear envelope disappears and the spindles form, and the chromosomes condense.. The next step is metaphase when the chromatids are in the middle and the spindles begin to pull on polar ends of the cell. Telophase is when the nuclear membrane begins to reappear. The rarest phase in this section was telophase.
ACTIVITY IC – Preparation of Onion Root Tip Slides
Phase Cell Count % of total Order (most to least)
Interphase 72 36 1
Prophase 40 20 3
Metaphase 65 22.5 2
Anaphase 24 12 4
Telophase 19 9.5 5
Biology 001, Laboratory Exercise 2 : Cell Cycle and Mitosis & Meiosis Setup
Brooker, Robert J., Eric P. Widmaier, Linda E. Graham, and Peter D. Stiling.Principles of Biology. N.p.: n.p., n.d. Print.
Need Writing Help?
Get feedback on grammar, clarity, concision and logic instantly.Check your paper »
- The seven characteristics that are shared by all living things start with reproduction. This act is not necessarily required for individual organisms to survive, but is crucial for an entire species to thrive. For an organism to be able to reproduce it must be with its own kind; for example, humans with other humans or dogs with other dogs. Next is growth and development, cells enlarge and divide, the more cells there are, the larger the organism will become. Genetic information is passed down to them from their maternities; this will govern their growth as they mature and age.... [tags: Eukaryote, Bacteria, Organism, Plant]
1418 words (4.1 pages)
- Biology Presentation Narrative to accompany PowerPoint presentation. During growth, replication and division, chemicals from neighbouring cells create proteins that send signals to the developing cell. This differentiates the cell and determines which particular tissue it is to become. These chemicals also let the cells know when to stop replicating. Slide 1 Cells, Growth and Division Slide 2 1, Growth. As a child we need our cells to consistently divide because we are growing. Cell division is critical to ensure this growth.... [tags: Cell cycle, Mitosis, Cell division, Stem cell]
1143 words (3.3 pages)
- Life depends on cell division or the reproduction of cells. Mitosis and meiosis are both used to help the cell divide. Mitosis and Meiosis both consists of 5 different stages that help it divide. These 5 stages are: prophase, prometaphase, metaphase, anaphase and telophase. Mitosis results in two diploid cells. In prophase, it is the first and longest stage, the nucleoli begins to disappear and the chromosomes begin to condense as well. Also in this stage the mitotic spindle begins to form in the cell.... [tags: Mitosis, Meiosis, Cell cycle, Chromosome]
768 words (2.2 pages)
- 1.1 Cell cycle Growth and reproduction of eukaryotes depend on the cellular life cycle (cell cycle) whereby the cell duplicates its components to physically split into two identical daughter cells. In general, the cell cycle is divided into two phases: interphase where cell growth and DNA replication takes place, and mitosis where the duplicated DNA is divided into two daughter cells.The interphase of the cell cycle is further sub-divided into three discrete phases: G1, S and G2. During interphase, the cell is metabolically active and has distinct biochemical processes that prepares the cells for the cell division.... [tags: Cell cycle, Mitosis, Chromosome, Eukaryote]
1280 words (3.7 pages)
- The process of cell division plays a very important role in the everyday life of human beings as well as all living organisms. If we did not have cell division, all living organisms would cease to reproduce and eventually perish because of it. Within cell division, there are some key roles that are known as nuclear division and cytokinesis. There are two types within nuclear division. Those two types being mitosis and meiosis. Mitosis and meiosis play a very important role in the everyday life as well.... [tags: Mitosis, Meiosis, Chromosome, Cell cycle]
865 words (2.5 pages)
- a) Claim: 1. The Nervous system in the earthworm is interconnected with the Reproductive system for reproduction. 2. The Digestive system in the earthworm is interconnected with the Circulatory system for digestion and circulation of blood. 3. The Nervous system in the earthworm is interconnected with the Digestive system to eat. 4. The Respiratory system in the cricket is interconnected with the Circulatory system to respond to stimuli. 5. The Reproductive system in the cricket is interconnected with the Endocrine system for reproduction.... [tags: Blood, Heart, Digestion, Reproduction]
1237 words (3.5 pages)
- ... Most of the chemical reactions of the cell take place in the cytoplasm. The “powerhouse” or the “energy generators” of both plant and animal cells are the mitochondria. These substances convert the sugar and other organic molecules in the cell to produce ATP (adenosine triphosphate) – required as a source of energy for the chemical reactions of a cell. Furthermore, both cells have a cell membrane. The cell membrane is like the guard to a cell and controls what enters and leaves it. It is responsible for the absorption of important nutrients (e.g.... [tags: structures, cells, powerhouse]
605 words (1.7 pages)
- Menstrual Cycle Every month a woman who`s reproductive system is correctly working gets a monthly notice. This is her menstrual cycle, the shedding of the lining of the uterus which is basically blood released from the vagina. The bleeding lasts on an average 3 to 5 days, but sometimes commonly may last a little longer. In the first half of the cycle, levels of estrogen (a female hormone) will begin to increase. Estrogen is what makes the lining of the uterus grow and get thicker. The lining of the uterus is a region that will carry the embryo if a pregnancy is to occur.... [tags: Pregnancy, Childbirth, Menstrual cycle, Uterus]
1088 words (3.1 pages)
- Technology Assisted Reproduction Introduction Reproduction is fundamental for the perpetuation of a species and therefore is a trait all species possess. Human reproduction is usually not viewed in this context. Extinction of humans is not considered a threat, but the ability to reproduce is an issue of meeting social expectations. Psychologist Dr. Helen Fisher states that society tends to pressure women into feeling that motherhood is their sole connection to being female (Rutter, 1996). Likewise, men are influenced by society into feeling that they need to perform their part by "planting the seed" (Rutter, 1996).... [tags: Research Reproduction Essays]
3289 words (9.4 pages)
- Marsupial Reproduction Knowledge can be obtained and conveyed in a variety of ways. One can spend hours upon hours hidden away in the corner of a library, reading the thoughts and discoveries of other researchers and writers. Or, one can allow himself to make his own discoveries through experiments and observations that he makes himself. Both methods are necessary in order to come to a complete understanding of a topic. An experimenter cannot fully appreciate the things that she observes without having a background in that area.... [tags: Marsupials Reproduction Mammals Biolgoy Essays]
4054 words (11.6 pages)
- Vaccination : A Mandatory Cure
- The Rise And Fall Of German Imperialism
- Descriptive Essay - Original Writing
- Can The United States Government Be Trusted?
- The National Association For The Advancement Of Colored People
- Experiment On Single Cylinder Four Stroke Water Cooled Kirloskar Tv1 Di Diesel Engine