Dna Forensics And The Human Genome - 2744 Words

Before the 1980s, courts relied on testimony and eyewitness accounts as a main source of evidence. Notoriously unreliable, these techniques have since faded away to the stunning reliability of DNA forensics. In 1984, British geneticist Alec Jeffreys of the University of Leicester discovered an interesting new marker in the human genome. Most DNA information is the same in every human, but the junk code between genes is unique to every person. Junk DNA used for investigative purposes can be found in blood, saliva, perspiration, sexual fluid, skin tissue, bone marrow, dental pulp, and hair follicles (Phillips, 2008). By analyzing this junk code, Jeffreys found certain sequences of 10 to 100 base pairs repeated multiple times. These tandem repeats are also the same for all people, but the number of repetitions is highly variable. Before this discovery, a drop of blood at a crime scene could only reveal a person’s blood type, plus a few proteins unique to certain people. Now DNA f orensics can expose a person’s gender, race, susceptibility to diseases, and even propensity for high aggression or drug abuse (Phillips, 2008). More importantly, the certainty of DNA evidence is extremely powerful in court. Astounded at this technology’s almost perfect accuracy, the FBI changed the name of its Serology Unit to the DNA Analysis Unit in 1988 when they began accepting requests for DNA comparisons (Lewis, 1989). There are thirteen standard tandem repeats used in modern forensics, andShow MoreRelatedDna Forensics And The Human Genome2746 Words   |  11 Pages DNA Forensics Before the 1980s, courts relied on testimony and eyewitness accounts as a main source of evidence. Notoriously unreliable, these techniques have since faded away to the stunning reliability of DNA forensics. In 1984, British geneticist Alec Jeffreys of the University of Leicester discovered an interesting new marker in the human genome. Most DNA information is the same in every human, but the junk code between genes is unique to every person. Junk DNA used for investigative purposesRead MoreThe Human Genome Project1460 Words   |  6 PagesGene Essay Assignment: The Human Genome Project A genome is the complete DNA set of an organism. These DNA molecules are made up of two strands. Every strand is composed of four nucleotide bases: adenine, thymine, guanine, and cytosine. Complementary strands are paired in certain ways. Cytosine always pairs with guanine and adenine always pairs with thymine. The human genome holds about 3 billion base pairs, found in the chromosomes. Each of the 46 chromosomes are composed of thousands of genesRead MoreThe Uses Of Dn Dna Fingerprinting1486 Words   |  6 PagesTran Mr. Tucker AP Biology 26 August 2015 The Uses of DNA: DNA Fingerprinting Sir Alec Jeffreys’ 1984 discovery of DNA fingerprinting in England has revolutionized the criminal justice system by enabling legal entities to determine innocence or guilt of a suspect to a much higher level of accuracy(Butler). This discovery has also provided the ability to identify victims of natural disasters or catastrophes like 911(Lippincott). Additionally, DNA testing or profiling, has helped doctors and researchersRead MoreNext Generation Sequencing Is The Method Of Determining The Order Of Nucleotides1362 Words   |  6 PagesGENERATION SEQUENCING Introduction DNA sequencing is the method of determining the order of nucleotides in DNA. It includes the method that is used to determine the order of four bases -adenine, thymine, guanine and cytosine in DNA. DNA sequencing has greatly accelerated research and discovery in biological and medical field. The first DNA sequence was obtained using two-dimensional chromatography, in the early 1970s by academic researchers which was laborious. Now DNA sequencing has become easier andRead MoreDr. Ketchum Processed All The Samples1053 Words   |  5 Pagesgiven the samples and ask to run a DNA profile. The origin of the DNA samples was withheld from the laboratories. # Laboratory Type of Testing Paid Blind Study Author ship 1 North Louisiana Criminalistics Laboratory, Shreveport, LA Forensic DNA Extraction and DNA quantification No No Yes 2 DNA Diagnostics, Nacogdoches, Texas Forensic Extraction, Species Screening, Preliminary Species Sequencing and STR PP16 genotyping, mtDNA and nuDNA, testing known submitter (human) samples. No Yes No 3 SouthwesternRead MoreDna Biology : Forensic Science Essay958 Words   |  4 Pages1.1.1.1 Forensic DNA Biology: Deoxyribonucleic acid (DNA) has revolutionized forensic science. Of all the disciplines in forensic science, forensic biology has seen the most technological advances in the past thirty years. Forensic biology is a field of study that uses DNA to identify victims and to associate suspects and victims to crime scenes. The large forensic advantage of high copy number and the stability of the mtGenome is a direct consequence of the mitochondrion’s function and evolutionaryRead MoreThe Consequences Of DNA Investigation769 Words   |  4 PagesBecause of the occurring variation in the DNA molecule from one person to another, the sequence of the fragments forms a pattern. Using an in front of approach called match/ binning, they first decide whether there is a match between the lengths of DNA fragments from the suspects and crime samples. . If it match they determine a match of percentage. The molecule is found in every living cell in the body, carries the genetic information that makes one individual separate and distinct from every otherRead MoreHuman Genome Project Essay examples504 Words   |  3 PagesHuman Genome Project The Human Genome Project is an international project basically sponsored by the U.S Government. It started in October 1990 with an aim to sequence the entire human genome. The complete set of information present in the form of the genes in an organism forms its genome. Each human being has 23 pairs of chromosomes having DNA double helix in each. The Human Genome Project is a worldwide research effort with the goal of analyzing the structure of humanRead MoreEssay on The Human Genome Project1437 Words   |  6 Pagesdeeply in our body is the complex biological story. The Human Genome Project is the exploration of this intricate yet crucial storyline. The Genome is a complete set of genes that make up an organism. Genes are made up of DNA (deoxynucleic acid) which subsequently is made up of long paired strands. These paired strands attach in a specific manner, for example, Adenine (A) attaches itself to Thymine (T) and Cytosine(C) to Guanine (G). The genome is the perplexing key in instructing cells to do theirRead MoreMaintaining National Dna Database Case Study1120 Words   |  5 PagesMaintaining National DNA Databases: Struggle between Necessity and Ethic SNEHA SINGH1 1Advocate, Rajasthan High Court, Jaipur, Rajasthan, India Email – ssnehassingh1989@gmail.com 1. INTRODUCTION DNA is an acronym, which stands for deoxyribonucleic acid. Every cell in an individual’s body, with the exception of red blood cells and eggs or sperm, contains the full genetic program for that individual in its DNA. The human genome, which consists of about 3 billion base pairs, harbours genetically relevant