Hi, Joe Bob’s here. I’m pretty sure I last left you in the study of mitosis. Mitosis is very similar to our study today, Meiosis. Now, In Meiosis there is only one more phase for each stage of Meiosis, then Mitosis. Let’s see where I’m heading first in my Magical Meiosis journey. Let Maryann tell you about the back round of Meiosis. “Well, Joe Bob! As you and me both know, Meiosis is used for producing Gametes and sex cells. Gametes are basically sex cells; egg cells are gametes, and sperm cells as well, when they meet up, there is fertilization happening. In which the female gametes, and the male gametes come together and produce. Meiosis has two divisions, which is why; there is two of Prophase, two of Metaphase, and so…on. Also, in your journey you will come to find out that, the Meiosis process is a lot longer then Mitosis” “Now Joe Bob, off with your journey.” As I say goodbye to Maryann, whom was very helpful. I run in to Interphase, the first phase in Meiosis. “Hi Joe.” Says the phase. “Hello” I say. “What brings you to area?” he asked. “Well, I was just wondering if you could explain to me, what does do on in this phase?” I asked. “Well, that’s easy.” “First, the cell replicates it’s chromosomes, and is left with two sister chromotids which are held together by a Centromere.” Says Interphase. “But move on to Prophase 1 to find out much more.” He continues. As I follow the path down to Prophase 1. I saw the chromosomes double up and then combine again. I notice that this didn’t happen in Mitosis. I hurried along to Prophase 1 to ask what was with this abnormal behavior. “Why were all the chromosomes combining twice?” I asked. “Well, in this division, the chromosomes, pair up in 2 homologous chromosomes, each made up of two sister chromotids, and this is called a tetrad.” Prophase explains to me. “Okay, well then what is this process called?” I ask. “ This process is what we call synapsis.” Prophase 1 explains. “Alright…Wait, what are they doing now? ”I exclaim. “Ohh…that is crossing over.” He tells me. “Ohh…I see, the genetic material is being moved to different locations. But what does that do for the cell?” I ask. “It is simple, crossing over, as we call it, is just the exchanging of genetic material, it gives the cell genetic variation.
The Electoral College is an outdated and unrealistic arrangement that caters to eighteenth century federalist America in a way that is detrimental to modern democracy. The electoral college gives too much power to the government, overlooks equal representation, and creates loopholes that do not serve to help America thrive.
Around the world, many people are living with neurologically debilitating disorders like multiple sclerosis. Multiple sclerosis is best described as a pathological “inflammatory-mediated demyelinating disease of the human central nervous system,” and affects more than 2.5 million people globally (Trapp & Nave, 2008).
Meiosis is specialized cellular division of sex cells. This type of cellular division occurs in single and multi-cellular organisms that undergo sexual reproduction. This process is split into two cycles: Meiosis I and Meiosis II. Prior to the start of meiosis, interphase occurs. Although interphase is not a stage of meiosis it is a vital preparatory step. It allows cellular growth, DNA replication and prepares for cellular division. Each cycle of meiosis is broken down into four stages for a total of eight stages. Meiosis I is composed of prophase I, metaphase I, anaphase I, and telophase I. Meiosis II is a repeat of each phase of meiosis I. Once meiosis is complete, the result will be four haploid daughter cells meaning that each daughter
As part of the cell cycle, mitosis is the nuclear division of replicated chromosomes by the disconnection of the replicated chromosomes to form two genetically identical daughter nuclei. Escorted by mitosis is commonly the process of cytokinesis. The cytokinesis process entails a dividing cell splitting into two, resulting in the subdivision of the cytoplasm into two cellular suites.
Cell division is extremely important; cells must divide in order to maintain an efficient volume to surface area ratio, allow organisms to grow and develop, and repair any damaged tissue. Cells are able to do all this through two processes: meiosis and mitosis. Without these processes, humans would not be able to do many of the basic functions we are so accustomed to, including growing, healing even the smallest cuts, and even reproducing! However, meiosis and mitosis, although both procedures for cell division, are very different.
Multiple sclerosis, also known as MS, is one of the humankind’s most mysterious diseases. Multiple sclerosis has the ability to affect nearly 3 million people worldwide. This disease tends to be more common in individuals of northern European descent and women are more than twice as likely to develop multiple sclerosis as men are. Of those 3 million people, most of them are between the ages of 20 and 50 years old. Even though multiple sclerosis is a mystery disease, scientists are working to determine the exact cause and treatment.
The Electoral College was a compromise between those at the Constitutional Convention who wanted the US president elected by popular vote and those who wanted congress to select the president. They believed that having it where each state would get a certain number of votes based on population would keep a manipulative and charming person out of office. They thought it would prevent bribery and corruption along with secret dealings. I don’t think that this is the case and it one of the reason I feel that the Electoral College should be abolished.
Multiple Sclerosis is a disease of the brain and central nervous system that is potentially disabling. Multiple Sclerosis, commonly called MS, is a disease where the immune system attacks to protective myelin sheaths that cover the nerve fibers, which causes communication problems between the brain and the rest of the body. The disease can cause the nerves themselves to be damaged, either temporarily or, in some cases, permanently. MS is a disease that has the natural tendency to remit spontaneously. MS is an unpredictable disease that is rare and hard to treat as there is currently no cure. However, although there is no cure many of the people who are diagnosed with MS do well with no therapy as there are many medications to help with the
Multiple Sclerosis is a nervous system disease that affects the spinal cord and the brain by damaging the myelin sheaths that protects nerve cells. Destroyed myelin prevents messages from communicating and sending properly from the brain, through the spinal cord, to internal body parts. In the United States, more than 350,000 people are diagnosed with this disease. Anyone can get this disease, but it is more common among Caucasian women. MS symptoms begin between the ages 20-40 and are caused by nerve lesions being present in multiple areas of the Central Nervous System, symptoms differ on the lesion’s location.
Multiple Sclerosis (MS) is a debilitating disease that affects approximately 400,000 Americans. It occurs two to three more times in women than in men and is most prevalent in women in their early thirties which makes researcher believe hormones play a significant role in developing MS. Patients can go through periods of relapse and remission with the possibility of the symptoms getting progressively worse with each occurrence. Statistics show that eighty percent who have MS will live twenty or plus years after its onset. Even with all the recent medical advances and research, MS is an overwhelming diagnosis to encounter.
It is clear that Multiple Sclerosis is a dreadful disease. Its multiple variations not only induce neurological debilitation but it can also bring about other disorders. Unfortunately, a cure hasn’t been created yet but medications and a healthy lifestyle can make the victim’s life much easier.
In the Prophase, chromosome as double threads joined at centromere and then shorten and thicken. Then nucleolus and nuclear membrane disappears. Fibrils of astral rays extend across forming mitotic spindle. After that centriole divides into two.
The process of meiosis is different from many other forms of cell division. In meiosis the daughter cells only have half the number of chromosomes of the parent. What that means is that the cells produced in meiosis are not exact copies of the original cell. Meiosis is fragmented down into many stages. Every cell in the course of meiosis includes the cell growing, dividing, and spitting, and dividing again in order to create the four cells as the end product.
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. Mitosis is the asexual reproduction in which two cells divide in two in order to make duplicate cells. The cells have an equal number of chromosomes which will result in diploid cells. Mitosis is genetically identical and occurs in all living
The aim of the experiment is to better understand the process and stages of mitosis. Prepare specimens of onion root in order to visualize all stages of mitosis, and estimate the relative length of each stage of mitosis.