1 – Mitosis and Meiosis 1. A certain species has three pairs of chromosomes: an acrocentric pair‚ a metacentric pair‚ and a telocentric pair. Draw a cell of this species as it would appear in metaphase of mitosis. (BAP 2.18) 2. A cell in G1 of interphase has 12 chromosomes. How many chromosomes and DNA molecules will be found per cell when this original cell progresses to the following stages? (BAP 2.20) a) G2 of interphase b) Metaphase I of meiosis c) Prophase of mitosis d) Anaphase I of meiosis
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Observation of mitosis in garlic root tips Abstract The purpose of this experiment was to establish the different stages of mitosis which occur in the tip of a garlic root. The root tip which was used had already been pre-stained with an aceto-orecein stain. The stain made the root tips more visible so that under a light microscope it would be much easier to distinguish where the root tip was. While under the light microscope the objective was to be able to identify and distinguish each of the stages
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Unit 1: fundamentals of science. Title An investigation of an onion cell using a light microscope. Aim: The aim of this investigation is to identify the cells within an onion skin using a light microscope. An onion cell is a plant cell which through the light microscope‚ it should outline the cell wall‚ cell membrane and the nucleus. Introduction: Plant cells have a cell wall and cell membrane which animal cells do not have. The cell wall provides support and is relatively rigid‚ which consists
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Lab 11: Mitosis Mitosis is a part of the cell cycle process by which chromosomes in a cell nucleus are separated into two identical sets of chromosomes‚ each in its own nucleus. Mitosis has several phases during the cell cycle. The experiment obligated pictures of onion root tips under the microscope. The pictures had cells and chromosomes. The pictures also had different phases of mitosis in them. As my hypothesis‚ cells stay in the interphase the longest. To begin the experiment‚ there were pictures
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of Onions”‚ you will read about the ways that you can impact the flavors and textures of different types of onions ranging from the more pungent to the milder. Bomze makes clear the two basic types of onions to look for when choosing a pungent or mild onion at the store. Shopping tips are included on how to check the neck‚ firmness‚ and thickness of skin when searching for a milder or more pungent onion. You will also learn in this article how to work with and control the flavor of the onion by
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Lab Report: To investigate the effect of temperature of the permeability of cell membranes DCP (Data Collection and Processing Section) Raw Data Absorbance of the colored beetroot solution at 565 nm of different temperatures of 30℃‚ 40℃‚ 50℃‚ 60℃‚ and 70℃ Temperature (℃) (± 0.1℃) Absorbance of the colored beetroot solution at 565 nm (± 0.001 AU) Trial 1 Trial 2 Trial 3 Trial 4 Trial 5 30 0.160 0.129 0.136 0.135 0.128 40 0.481 0.343 0.376 0.491 0.410 50 0.386 0.597 0.378 0.743 0
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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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Observation of Mitosis Introduction: Reproduction is the biological process by which new individual organisms are produced. There are two types of reproduction‚ which are; asexual and sexual reproduction. Asexual reproduction is creation of offspring whose genes all come from one parent. Sexual reproduction is creation of offspring by fusion of male gametes (sperm) and female gametes (eggs) to form zygotes. Asexual reproduction involves a type of cell division known as mitosis. Mitosis is the scientific
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Introduction The main purpose of root canal treatment is the elimination of microorganism from root canal system (1‚2). Microorganisms and their byproducts are regarded as the primary etiological factors of periapical diseases and pulpal necrosis (3‚4‚5). Microbial reduction obtained by mechanical instrumentation‚ irrigation‚ using intracanal medicaments and adequate filling of root canal (6). Failure of the root canal treatment is the result of persisting microorgansims in the root canal system even in well-treated
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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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