Wednesday, May 6, 2020

Essay about Biology DNA Forensics - 1790 Words

DNA forensics is a division of forensic science that focuses on the use of genetic material in criminal investigation to answer questions pertaining to legal situations, including criminal and civil cases. Through DNA testing, law enforcement officers are able to identify human remains or the individual responsible for a crime. DNA testing is a highly advanced scientific process that involves replicating the human DNA sequence to create a genetic map of an individual. Because of its reliability, DNA testing has become a significant factor in criminal cases. However, it has also been identified as having the potential to violate privacy and constitutional rights. The DNA identification process consists of five stages. These five stages†¦show more content†¦Recently, DNA testing has been employed to create a genetic database of endangered animal species. Using this information, scientists have even cloned animals. When life arose on Earth about 4 billion years ago, the first types of cells to evolve were prokaryotic cells. For approximately 2 billion years, prokaryotic-type cells were the only form of life on Earth. The oldest known sedimentary rocks found in Greenland are about 3.8 billion years old. The oldest known fossils are prokaryotic cells, 3.5 billion years in age, found in Western Australia and South Africa. The nature of these fossils, and the chemical composition of the rocks in which they are found, indicates that these first cells made use of simple chemical reactions to produce energy for their metabolism and growth. Eukaryotic cells evolved into being between 1.5 and 2 billion years ago. Eukaryotic cells appear to have arisen from prokaryotic cells, specifically out of the archaea. Indeed, there are many similarities in molecular biology of contemporary archaea and eukaryotes. However, the origin of the eukaryotic organelles, specifically chloroplasts and mitochondria, is expla ined by evolutionary associations between primitive nucleated cells and certain respiratory and photosynthetic bacteria, which led to the development of these organelles and the associated explosion of eukaryotic diversity. Today ProkaryotesShow MoreRelatedDna 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 MoreTechnology And Science By Law Enforcement1653 Words   |  7 PagesThe National Institute of Justice defines forensic science as, â€Å"the application of science, such as physics, chemistry, biology, computer science, and engineering to matters of law,† (2014). The emphasis here is the use of technology and science by law enforcement officers and agencies and is accepted and recognized by the criminal justice system. It is seen as scientific technology or Criminalistics, (Dempsey Forst, 2013). While technology plays a role in this, it is most recognized by the useRead MoreForensic Pathology, Toxicology, And Biology1077 Words   |  5 Pages Forensic science consists of a variety of fields such as in this case Forensic Pathology, Toxicology, and Biology were used to help solve the murder. Forensic Pathology was used to determine the cause of death by conducting an autopsy on the Johnson body. Coming to a conclusion, that Denise Johnson’s cause of death was due to asphyxiation (also known as strangulation)2,9. The pathology unit also determined that her death was a forced and violent death. Given the facts of how the victim died itRead MoreThe Convergence Of DNA Analysis And Forensic Sciences1047 Words   |  5 PagesThe convergence of DNA analysis and Forensic sciences is a recent one, given the relatively new discovery of accurate analysis of DNA. 1953 was a critical year for the field of molecular biology; Rosalind Franklin, James Watson, and Francis Crick sol ved the double-stranded, helical nature of DNA. Nearly three decades later, Kary Mullis invented the polymerase chain reaction (PCR) in 1983, followed only a year later by Sir Alec Jeffreys and his development of the restriction fragment length polymorphismRead MoreUses for Trace Evidence in Forsensic Science1176 Words   |  5 Pages There are various uses for trace evidence in forensic science. Trace evidence can include a variety of disciplines including hair, paint, fiber, rope, soil, glass, and building materials. According to Locard’s Exchange Principle, every contact leaves a trace. Whenever a criminal comes in contact with a victim, there is an exchange of materials between the two. When discovered, this exchange can provide key evidence in a case. Paul Kirk (1974) states in his book Crime InvestigationRead MoreIntroduction. Forensic Dna Phenotyping Is A New And Emerging1577 Words   |  7 PagesIntroduction Forensic DNA Phenotyping is a new and emerging field of forensic science. As it is so new, there is very little in terms of literature on this field, very little testing done on this type of identification, and few cases that have used DNA Phenotyping to assist in the investigation. The first documented case of DNA Phenotyping being used is in the early 2000s, so it has had under 20 years of research and experimentation with it. There are many weaknesses to the version of DNA PhenotypingRead MoreForensic Science : A Forensic Scientist1648 Words   |  7 PagesIntroduction Topic: Forensic Science In general, a forensic scientist’s job provides an objective, scientific analysis to discover the truth and use that truth in legal proceedings. Forensic scientists take items of evidence collected from crime scenes and determine their relevance to the case by examining and analyzing the evidence. There are various types of forensic scientists that specialize in specific examinations and analysis of different types of evidence. Eventually forensic scientists willRead MoreHuman Body Systems Career Journal974 Words   |  4 PagesHuman Body Systems Career Journal 2015-2016 Entry #1 Activity: 1.2.3 Bone Detectives Description: Forensic Anthropologists helps to study the skeletal systems of people to determine the sex, ethnicity, and distinct characteristics of the dead skeleton they are studying. Definition for Forensic Anthropologist: As a Forensic Anthropologist you will be working with and investigating disease people. You will study the entire body as well as the skeletal structure and be able to get specifics as to whoRead MoreForensic Misconduct1639 Words   |  7 PagesForensic Misconduct: Dr. Pamela A. Fish Kirstin L. Daniels Professor Ian Rodway George Mason University Forensic Misconduct: Pamela A Fish Forensic science is defined as the practice of utilizing scientific methodologies to clarify judicial inquiries. The field of forensic science contains a broad range of disciplines and has become a vital aspect of criminal investigations. Some forensic disciplines are laboratory-based; while others are based on an analyst’s interpretationRead MoreEffects Of Temperature On The Quality Of Dna Extracted From Manila Envelopes1526 Words   |  7 Pagesquality of DNA extracted from Manila envelopes Research Proposal Janet Boateng November 15,2014 First draft Forensic Biology 5410 Abstract/summary: In the case of mail threat to an individual, it is possible that DNA evidence could be left by the perpetrator on the adhesive strip of a manila envelope. The process of delivery mail via U.S. Postal Services may take from 3-7 business days, with temperature factoring into the quality of analysis of any DNA. If mail

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