Biology March 5‚ 2015 Introduction In the Mitosis lab an onion root was observed under a microscope to observe whether or not cell division takes place. Also‚ whether cells replicate in order for it to reproduce. By observing the onion root under the microscope it allows many layers to be looked at through each cell division. The goal of Mitosis is the replication of cells to produce multiple like cells. The steps involved in Mitosis are what is known as the PMAT stages‚ which are the following:
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@ Mitosis begins Cell moves from interphase into mitosis-----DNA and chromosome (have been replicated and ready to separate) 细胞相间移动，DNA和chromosome已经复制，准备分离 Biologists often refer to the process in separate subphases because of significant events that occur. 一般当成单独的子阶段，因为重要 @The phases of mitosis 1. Prophase (before phase) Chromosomes become visible as thread-like form when using light microscope. Each chromosome is duplicated and consists of two sister chromatids‚ join together by a centromere
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Process of Mitosis Mitosis is the term used to describe cell division for replication. The product at the end of mitosis is two daughter cells both genetically identical to the original (parent) cell. This process (mitosis) is used for growth and repair within an organism (and also for asexual reproduction). There are five main stages to mitosis‚ called Interphase‚ Prophase‚ Metaphase‚ Anaphase and Telophase. Although the process has been divided up into these stages the process of mitosis is actually
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1 Marks: 1 Identify the stage of somatic cell division. Choose one answer. a. Anaphase b. Prophase c. Metaphase d. Telophase e. Interphase Which of the following characteristics are typical of this stage? Choose one answer. a. Chromosomes have split and chromatids are moving towards the opposite poles b. Chromosomes have reached opposite poles and are reorganizing to form two new nuclei c. Nuclear membrane and nucleolus have disappeared and chromosomes
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Practical 1: Observation of mitosis in garlic root tips Introduction The practical will involve the preparation‚ observation‚ and classification‚ of the various stages of mitosis by observing garlic root tips using a microscope. The study comes under the heading of cytogenetics which is the visual characterisation of genetic material and the study of how that material reacts during the life of the cell. Strictly speaking‚ mitosis is the division of the nucleus into two daughter nuclei that are
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Week 3 Mitosis and Meiosis Assignment William Scalia Grantham University Week 3 Mitosis and Meiosis Assignment A rare disease that is inherited is Tay-Sachs disease. What the disease does is it destroys nerve cells located in the Spinal cord and the brain. The most common type of Tay-Sachs appears in infants. The disease is present early in development but the symptoms usually don’t appear until after the age of 4. Symptoms appear as a slowing or halting of development to include
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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
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Mitosis is a way to help your body replace worn out cells. Mitosis has five phases‚ six if you include Cytokinesis. The phases of Mitosis are Interphase‚ Prophase‚ Metaphase‚ Anaphase‚ and Telophase. These phases all work together in order to help recover worn out muscles ‚ skin and other types of cells. Mitosis is when one cell divides into two daughter cells. Mitosis is very useful for organisms. Without Mitosis organisms would not be able to repair cuts and could result in death. It is also
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Mitosis in Plant and Animal Cells OBJECTIVES Observe and identify cells undergoing the process of mitosis. Compare the stages of mitosis in plant cells with these stages in animal cells. MATERIALS • compound light microscope • prepared slides (longitudinal sections of onion or garlic root tips) • prepared slides (whitefish blastula or other animal tissue) Procedure PART 1: MITOSIS IN PLANT CELLS 1. Observe a prepared slide of a longitudinal section of onion or garlic root tips. Use low
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Meiosis and Genetic Diversity in Sordaria Biology 110 Lab Results Individual Data: Non-recombinant | Recombinant | Total # of Asci | Total # Recombinant Asci(B + C) | Frequency of Recombinant Asci(B + C)/total # asci) | Frequency of Type B Asci(B/total # asci) | Frequency of Type C Asci(C/total # asci) | Ratio B/C | # of Type A Asci(4:4) | # of Type B Asci(2:4:2) | # of Type C Asci(2:2:2:2) | | | | | | | Tan Spore Color | | | | 14 | 6 | 6 | 26 | 12 | (6+6)/26= 6/13 | 6/26=
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