Mitosis and Meiosis Essay

AbstractThere argon ii types of nuclear division, mitosis and meiosis. Mitosis is usually apply for the crop and replacement of somotaic cells, while meiosis produces the gametes or spores used in an organisms reproduction.HypothesisMitosis supervenes in whitefish blastula and onion ascendant tip, and it is easily observable. miosis and interbreeding everywhere occurs in the production of gametes and spores.MaterialsThis testing ground required prep atomic name 18d slides of whitefish blastula, onion root tips, ovary, and testis, a microscope, and chromosome kit. The prepared slides of whitefish blastula and onion root tips, ovary, and testis were observed chthonian the 10x and 40x objectives.Mitosis is easily observed in cells that are growing at a speedy pace such as whitefish blastula or onion root tips, which was used in this lab experiment. The root tips keep and area called the apical meristem that has the highest percentage of cells undergoing mitosis. The whit efish blastula is tuneed directly after the musket ball is fertilized. This is a period of rapid offshoot and numerous cellular divisions where mitosis rump be observed. In mitosis the cell is in interphase, and hold back a different nucleus and nucleoli where the slender threads of chromatin thicken into distinct chromosomes and the nuclear evvelope breaks open releasing them into the cytoplasm. The firs signs of the capitulum begin to appear, next the cell begins metaphase, where the spike attaches to the Centromere of each chromosome and moves them to the same level in the middle of the cell. This level posture is called the metaphase plate. Anaphase begins when the chromatids are separated and pulled to opposite poles, hence the final stage is telophase. The nuclear gasbag is reformed and the chromosomes gradually uncoil. Cytokinesis may occur, in which, a cleavage furrow impart form and the both daughter cells lead separate.Meiosis is more complex and involves car dinal nuclear divisions. The two divisions are called Meiosis I and Meiosis II and they topic in the production of four monoploid gametes. Thisprocess allows increased contractable form due to crossing oer where genes can be exchanged. This process allows increased genetic variation due to crossing over where genes can be exchanged. The process , the like mitosis, depends on interphase to replicate the DNA. Meiosis begins with Prophase I. In this stage, homologous chromosomes move together to form a tetrad and and synapsis begins. This is where crossing over occurs resulting in the recombination of genes. Metaphase I moves the tetrads to the metaphase plate in the middle of the cell, and Anaphase I reduces the tetrads to their original two stranded form and moves them to opposite poles. Telophase I then prepares the cell for its econd division. Meiosis II generally resembles mitosis except that the daughter cells are haploid instead of diploid. DNA facts of life does not occur in Interphase II, and prophase, metaphase, anaphase, and telophase occur as usual. The only change is the number of chromosomes.ReferenceLabPaq, Englewood Co, 2008Raven, Johnson, Mason, Losos, and Singer. Biology 10th Ed., McGraw-Hill., brand-new York, NY., 2014 http//faculty.clintoncc.suny.edu/faculty/michael.gregory/files/bio%20101/bio%