Biology Mitosis Lab - 1242 Words

AP BIOLOGY- Mitosis and Meiosis Cell Division Lab Part 1-MITOSIS summary: In this experiment first the stages of an onion cell undergoing mitosis are going to be observed and every stage is going to be detected and drawn on paper. A brief description to what is going on should be attached to the pictures. This is important to understand the basics of cell division which is necessary growth,repair and asexual reproduction. Second the number of cells undergoing each phase is going to be counted to figure out in which phase the cell remains the most. If interphase is the stage in which the cell grows and prepares for cell division then the†¦show more content†¦Later on a male and female haploid cell will join to form a diploid cell with the right number of chromosomes. Meiosis consists of one DNA replication and two nuclear divisions resulting in 4 daughter cells. The process which provides for genetic variation is crossing over. Crossing over occurs in the early stages when homologous chromosomes move together so that their chromatids form a tetrad. This is called synapsis and allows for the exchange of chromosome sections. In our case the crossing overs will result in different colorings of the ascospores of the S. fimicoli. Materials: -Microscope -S.fimicola meiosis cards Procedure: 1-Study the different phases of meiosis on the cards. 2-Notice the difference between ascospores with sequences of 4’s and 2’s. 3-Count the amount of different sequences present. 4-From the data you gathered calculate the percentage of asci showing crossover. Analysis: Out of a total from 26 sequences only 6 were made up of 4‘s while 20 were composed of different structures of 2‘s. This tells us that 77% of the asci showed crossing over while 23% did not. Conclusion: Our hypothesis that if meiosis is present the new formed asci will have different colors was supported by the outcome of our observations. The fact that different sequences of 2’s emerged from the first pattern of 4’s is prove that crossing over took place. GeneticShow MoreRelatedVarious Phases that Make Up the Cell Cycle Essay examples1314 Words   |  6 PagesThe two main phases that occur during a cell cycle are interphase and mitosis. During most of a cell cycle, the cell spends a majority of its time in interphase resting in the cell cycle. Within interphase, the cell goes through 3 phases; 2 growth phases and DNA replication. During Interphase the cell goes through its first gap phase (G1). During G1 protein and RNA synthesis occurs so that the cell can grow and mature. (Cooper, Geoffrey M) G1 is very important because it controls the rate at whichRead MoreMitosis Lab Report1157 Words   |  5 PagesLife Science Lab. A. Arnold Tuesdays @ 2:30 September 30th, 2011 Lab Report: Nuclear and Cell Division. PART A: Stages of Mitosis in my own words. 1. Interphase: DNA has formed already, but it remains in the simple form of chromatin. Chromatins are structures that are loosely coiled in the cell.3 I also observed during my lab that this was the only stage where I could still see a nucleus and nucleolus intact within the cell; this is because it’s the only stage where the nuclear membrane hasRead MoreEssay about Lab 8, Mitosis and Meiosis894 Words   |  4 Pagesï » ¿Julie Lake November 8, 2012 BIO 111, C11- Online Villalpando, Shawn Lab 8 Title: Mitosis and Meiosis Exercise 1: Mitosis in Animal and Plant Cells Questions: A.) What is the purpose of mitosis? The purpose of mitosis is to create or produce more cells for a living organism. Mitosis occurs when genetic substance in the nucleus divides or separates in order to create more cells. Cytokinesis normally occurs next and the single cell develops into two separate cells. This same process continuesRead MoreCell Biology Meiosis and Mitosis1435 Words   |  6 PagesCell Biology (CP8121) Experiment 2: Observing Mitosis and Meiosis on cell specimens (Formal report) Name: Wong Chung An Class: DMLS/FT/1B/02 Admin number: P1138687 Summary This experiment aims to observe mitosis and meiosis on cell specimens. It involves the modelling of the stages of meiosis and also the staining procedures to identify mitosis in onion root tip. There are two parts to the procedure of the experiment whereby the first is staining and observing mitosis in onion root tips and theRead MoreSex-Linked Traits Through Meiosis and How It Relates to Genetics.1609 Words   |  7 Pages|Principles of Biology | Copyright  © 2011, 2010, 2008 by University of Phoenix. All rights reserved. Course Description This course is designed to introduce biology at an entry level by examining the hierarchy that ranges from the fundamentals of cell biology to the physiology of organisms, and the interactions among those organisms in their environment. The topics in this course include cell biology, genetics, molecular biology, evolutionRead MoreObserving Mitosis1208 Words   |  5 PagesLab Report â„â€"3 Title:Observing Mitosis By Yerkebulan Yesbolatov Biology course, tutorial group I October 18, 2012 Lab partner: Azhar Zhaisanova Introduction Experiment is intend to show mitotic stage of cell cycle, phases of mitotic stage, to define predominance in the number of each phases over the others, if it is possible. Objectivity of lab is to observe the different phasesRead MoreMy Memories Of Science And Science1304 Words   |  6 Pagesprogram to save more money for basketball. I know that Science Olympiad has greatly influenced my science concentration that I have now, and I am so happy that it did. I had Mr. Spase for seventh and eighth grade science, where I remember making a mitosis song (that I can still sing) and planet PowerPoints (mine was about Jupiter). Even though this has nothing to do with science, I remember playing â€Å"stump the chump† with Mr. Spase. It was a game where we asked him any question about anything, and theRead MoreDetermining the Unknown Genotype of Corn Plants of the Zea Mays Species from the Phenotypes of Offspring Produced1258 Words   |  6 Pagesof Corn Plants of the Zea mays Species from the Phenotypes of Offspring Produced Abstract No one particular organism is an exact replica of another. Diversity in the world is key for future generations to adapt to the fast changing world. This lab observed the corn plant of the Zea mays species to determine the genotype for the gene of tall versus dwarf in unknown parent corn plants by observing the seedlings produced. It was hypothesized that one parent is heterozygous while the other is homozygousRead MoreExamination Of Cell Division And Dna Replication956 Words   |  4 PagesThe experiments of the past week allowed examination of cell division and DNA replication, the processes by which cells carry out important functions. It is important to have an understanding of these processes in order to have an understanding of biology. These most small occurrences are the basis for life in all cells. Without division and DNA replication, organism could not grow and carry out complex tasks, such as metabolism. In addition, natural selection can only occur where genetic variat ionRead MorePurpose Driven Life1328 Words   |  6 Pagesthem, I would use these strategies in a biology classroom. For example, if I were teaching a lesson about mitosis and cell division, I would read a story where the parts of the cell and chromosomes are characters. I would also include some songs about the different phases. Making a poster with a huge slogan on it is also a method I would use. I would make 3-4 of the same posters and put them all around the classroom. They would say something simple like â€Å"Mitosis makes one cell into two.† The challenge