Much can be learned from studying an organisms DNA. The first step to doing this is extracting DNA from cells. In this experiment‚ you will isolate DNA from the cells of fruit. Materials (1) 10 mL Graduated Cylinder(2) 100 mL Beakers15 cm Cheesecloth1 Resealable Bag1 Rubber Band (Large. Contains latex pleasewear gloves when handling if you have a latex allergy).Standing Test TubeWooden Stir StickFresh‚ Soft Fruit (e.g.‚ Grapes‚ Strawberries‚ Banana‚ etc.) ScissorsDNA Extraction SolutionIce Cold EthanolYou
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Homosexuality and DNA Honors Biology The human X and Y chromosomes have been completely sequenced. The X chromosome contains 153 million base pairs and harbors a total of 1168 genes. While the Y chromosome contains only 50 million base pairs and is estimated to contain about 251 genes. Educational institutions such as Baylor University‚ the Max Planck Institute‚ the Sanger Institute‚ Washington University in St. Louis‚ and others have spent countless hours and millions of research dollars
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the structure of DNA and discuss how it facilitates the ability of DNA to act as genetic material • Compare and contrast prokaryotic and eukaryotic chromosomes • Describe the process of DNA replication as a semi-conservative process. Compare and contrast the synthesis of the leading and lagging strands in DNA replication. • Explain how the genotype of an organism determines its phenotype. • State the central dogma of genetics and explain the roles of DNA and RNA in polypeptide
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DNA fingerprinting is a way of identifying a specific individual‚ rather than simply identifying a species or some particular trait. It is also known as genetic fingerprinting or DNA profiling. As a technology‚ it has been around since at least 1985‚ when it was announced by its inventor‚ Sir Alec Jeffreys. DNA fingerprinting is currently used both for identifying paternity or maternity and for identifying criminals or victims. There is discussion of using DNA fingerprinting as a sort of personal
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DNA sequencing From Wikipedia‚ the free encyclopedia [pic] The term DNA sequencing refers to sequencing methods for determining the order of the nucleotide bases—adenine‚ guanine‚ cytosine‚ and thymine—in a molecule of DNA. Knowledge of DNA sequences has become indispensable for basic biological research‚ other research branches utilizing DNA sequencing‚ and in numerous applied fields such as diagnostic‚ biotechnology‚ forensic biology and biologicalsystematics. The advent of DNA sequencing
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ions -DNA replication minimizes errors such as the DNA that is duplicated but changes in the DNA do occur‚ producing mutations. Although most mutations are either neutral or harmful they are also the raw material for evolution. Such mutations from alleles‚ alternate forms of a given gene that may produce differences in structure or function such as black‚ brown or blond hair in humans‚ or different mating calls in frogs. Stages of Mitosis~ 1)Parent cell. 2)Chromosomes make identical copies
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DNA FINGERPRINTING Background Reading - Nelson Biology and Campbell Biology Purpose - To understand the basics of DNA fingerprinting used in the Canadian courts for crime convictions and paternity suits. Introduction The process of DNA fingerprinting was developed by Professor Alec Jeffreys at Leicester University in 1984 as a form of genetic analysis. It was first used in the law courts of England in 1987 to convict a man in a rape case. It has now been used successfully in many crime and paternity
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DNA REPLICATION At the replication origin DNA helicase attaches to a strand of DNA and begins to break apart hydrogen bonds in order to unravel a section of the double helix. The section of DNA that is unwound is called the replication bubble and the “Y” shaped sections are called the replication forks. In order to stop the unwound section from binding back together‚ single strand binding proteins react with the single strand portions on the DNA causing them to stay separated. Although the leading
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Dowdell DNA Exonerations Forensics Period 9 1. After more than three decades in prison‚ a man in Florida was set free Thursday after a DNA test showed he did not kidnap and rape a 9-year-old-boy in 1974. James Bain‚ 54 was 19 when he was convicted on charges of kidnapping‚ burglary and strong-arm rape. Now he will be allowed to go home for the first time in 35 years. James Bain was convicted due to the victim picking him out of five photos. Bain kept pursuing DNA tests but was
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An Introduction to DNA microarrays Rebecca Fry‚ Ph.D. http://www.buffalo.edu/UBT/UBT What is a DNA Microarray? genes or gene fragments attached to a substrate (glass) Tens of thousands of spots Hybridized slide Two dyes Image analyzed 1 The Beginnings of Microarray Technology Lockhart et al.‚ 1996 Nature Biotechnology “Expression monitoring by hybridisation to high-density oligonucleotide arrays” Schena et al.‚ 1995 Science “Quantitative monitoring of gene expression
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