Mitosis Lab Report Example | Topics and Well Written Essays - 1250 words

Mitosis - Lab Report Example The prepared and preserved slides were observed under the microscope. The different stages of the mitosis such as interphase, prophase, meta phase, anaphase and telophase of the cell along with the cytokinesis were identified and the stages were differentiated. Introduction: All the living things are made of cells. In a multi-cellular organism, two types of cell division occur: they are mitosis and meiosis. Mitosis or Somatic cell division is the process in which one cell divides into two equal cells with genetic identity. The cell division is necessary for the growth and development of the cells. The transformation of information from one generation to another is called heredity and the genes which are the fundamental part of the chromosome are responsible for the transformation. The chromosomes are present in pairs. Each pair is responsible for a specific part or function in the cell. These chromosomes are distributed equally in new cells during mitosis. Mitosis is thus described a s the chromosomal division. This chromosomal division is accompanied by the cytoplasmic division called as cytokinesis. The mitosis along with cytokinesis results in the formation of two daughter cells. This is also called as cell cycle. Cell cycle is the period in which the cell divides and becomes two daughter cells. ... There are four stages in mitosis. They are prophase, metaphase, anaphase and telophase. (Allen and Harper 2011). Prophase is the first stage of mitosis which is visible. The chromosomes, which are randomly distributed in the cytoplasm condense to form the distinct part. They are held in a single line. Metaphase is the stage in which the chromosome is attached to the centromere through the spindle fibril. The centromeres are connected to the centrioles and the centrioles pulls the chromatids to the opposite directions. This step initiates the cell division. Anaphase is the stage where the chromosomes move to the position of centriole. The chromosomes are seen as complete sets in the opposite side of the cell. Telophase is the last stage of mitosis in which the chromosomes begins to loosen itself from the thicker rigid structure into thin filaments. The division of the cytoplasm starts at this particular point. Materials required: Prepared slide of Allium root tip Prepared slide of whi te fish blastula. Microscope. Method: 1. The prepared slide of allium (onion) root tip was mounted on the microscope. 2. The 4x objective lenswas used to focus the centre of the slide. 3. The cells undergoing the four stages of mitosis such as prophase, metaphase , anaphase and telophase were identified in the slide using the 10x magnification. 4. Using the 40x magnification in the microscope, the distinct chromosomes and the other cell structures were identified. 5. Similarly, the whitefish blastula slide was mounted on the microscope and the blastula sections were observed using the 4x magnification. 6. Then 40 x magnification was chosen to examine the chromosomes. The cells in each phase of mitosis were identified. Result: For the Onion Root tip: 1. In the interphase stage, nucleus,

International Relations and how Iran has effected the Middle East Research Paper

International Relations and how Iran has effected the Middle East - Research Paper Example Situated in the Persian Gulf, Iran remains the region’s strongest military power and hosts the region’s largest population. Moreover, Iran is the Persian Gulf’s â€Å"main country straddling the strategic Strait of Hormuz through which† more than half of the world’s oil passes (Ramazini, 1979, p. 821). The Persian Gulf’s strategic position and Iran’s prominent political and geographical position within, makes Iran a very important actor in both regional and international security. The Persian Gulf joins Africa, Europe and Asia and connected to the Indian Ocean, the Persian Gulf also connects the Mediterranean Sea, the Red Sea, the Pacific Ocean and the Indian Ocean. Moreover, Islam was born in the Persian Gulf and thus the culture of the Persian Gulf is profoundly characteristic of Islamic values (Sajedi, 2009). It is therefore hardly surprising that the Persian Gulf has come to be known as the â€Å"center of the Muslim world† (Sajedi, 2009, p. 77). Stagedi (2009) informs that: Owing to its strategic location, the Persian Gulf region has been the center of attention for traders, businessmen and big powers for a long time. The commercial interests, through shipment of goods from the Persona Gulf to the outside world and vice versa have made this region so important for big powers that wars have been fought over its control (p. 77). From 1700 hundreds forward, the Persian Gulf has been the focus of political and commercial competition among maritime factions in the West. When oil was discovered in the 1900s in the Persian Gulf, oil became another fortified the interest in the region. In the aftermath of the Second World War, the Cold War saw competition between the US and the Soviet Union for power in the Persian Gulf and the Middle East generally. Until 1991 a climate of fear was perpetuated in the region over