Meiosis Research Paper

Meiosis is the separation of a diploid cell in which results in the production of four haploid daughter cells containing half the number of chromosomes that were found in the parent cells. For example, the starting number of chromosomes is 46, which are paired into groups of two making 23 pairs of chromosomes. The process of meiosis is broken down into two courses: meiosis I and meiosis II. Before the stage of meiosis, a cell must undergo a phase described as interphase. Interphase consists of three stages known as the G1 phase, S phase, and the G2. The G1 phase is the phase in which the cell develops and grows. The S phase is the stage that represents the synthesis of DNA replication. The G2 phase of the cycle is the period in which the cell in beginning to prepare for the actual cell division. Once this phase is completed, meiosis begins. Both stages of meiosis are composed of phases such as prophase, metaphase, anaphase, telophase, and are concluded with cytokinesis, which differ depending on the cell that was being divided. Although, in meiosis I, there is an additional phase that is not always agreed amongst scientists
John Langdon Down was the physician in which Down Syndrome was named after. In order to officially diagnose this condition, people studied the chromosomes especially after Professor Jerome Lejeune discovered that those with Down Syndrome had an extra chromosome as opposed to the normal chromosomal count. Down syndrome is caused by nondisjunction, specifically, n+1, which means that there was an error in the separation of chromosomes in the formation of an egg or sperm, resulting in an extra chromosome. The people that have this disorder have facial features that represent a flat face, a big tongue, abnormal ears, slanted eyes that are turned upwards, and a flat and wide