DNA: The Making

DNALyle Sykes For more than 50 years after the science of genetics was established and the patterns of inheritance through genes were clarified, the largest questions remained unanswered: How are the chromosomes and their genes copied so exactly from cell to cell, and how do they direct the structure and behavior of living things? This […]

Dna and forensics

First appeared 1944 : any of various nucleic acids that are usually the molecular basis of heredity, are localized especially in cell nuclei, and are constructed of a double helix held together by hydrogen bonds between purine and pyrimidine bases which project inward from two chains containing alternate links of deoxyribose and phosphate. 1 : […]

Two Functions of DNA

Introduction In prior epochs, it was appropriate to explain talents, illnesses, vices, virtue and other heredity by statement: “it is in someone’s blood”. However, with the lapse of time, scientists began questioning the blood theory of inheritance. It was a long way to the realization that DNA transmits heredity. By the end of the 19th […]

Success of DNA Analysis

Over the course of time, DNA profiling has been proven to be a useful tool in as far as criminal investigations are concerned. The success of DNA aiding in the conviction of a criminal in a court of law, however, depends on a number of factors. For starters, the evidence has to be handled in […]

Molecule of DNA

In a molecular cloning experiment to determine the absence or presence of bacterial colonies on two plates, several observations were noted. The objective of this experiment was to transform a strain of bacteria, in this case, competent E. coli that had no antibiotic resistance through the insertion of DNA comprising of a gene which codes […]

DNA Structure

The human biology and diseases have been learned after the discovery of DNA structure, but it has not reveled much. This is due to the inability of determination of its relation to nature and the underlying causes of diseases. The DNA is icon of breeding and definition of genetics as it provides the explanation of […]

DNA Replication

According to Hallick (1995), Deoxyribonucleic acid (DNA) is defined as a nucleic acid containing the genetic instructions that are used in the functioning and development of all living creatures except the RNA viruses. DNA molecules play a very significant role as a long-term storage of genetic information and they are related to a set of […]

DNA Analysis

Since its introduction in 1985, DNA typing has revolutionized the science of forensic testing; presently, this kind of testing has become commonly used when determining an individual’s predisposition to a given disease, paternity, embryonic health and innocence or guilt. This field of forensic science has considerably improved the ability of agents tasked with the responsibility […]

Scientists who Discover DNA

With the continuous search for better understanding of how really human body works and the reason of having different physical and behavioural attribution forced a lot of scientists around the globe to conduct researches regarding the true source of our identity and this is how these scientist lead to the discovery of DNA. Body Actually, […]

Rosalind Elsie Franklin

One of the most notable breakthroughs in the field of Science is the discovery of the Deoxyribonucleic acid or DNA. It was discovered by Johann Miescher, a Swiss physician. Only after hundred years that the concrete structure of the DNA was finally made known to the scientific community. Though, James Watson and Francis Crick were […]

The Role of Hela Cell in Medical Development

Her name was Henrietta Lacks, but scientists know her as HeLa. She was a poor Southern tobacco farmer who worked the same land as her slave ancestors, yet her cells- taken without knowledge- become one of the most important tools in medicine (Rebecca Skloot). According to the scientists who have been growing HeLa for countless […]

Behavioral Genetics: The Molecular Basis of Our Personalities

The diverse array of technological advancements in the fields of molecular biology and biochemistry and the introduction of high throughput genome analysis equipment has greatly affected our understanding not only of the world we live in and our position in it but also, more importantly, of ourselves: our behavior, history and evolution. Edward Wilson, an […]

DNA Technology

The advent of DNA technology has revolutionized the way law enforcement conducts criminal investigation. This scientific approach is today’s most effective tool in solving crimes. DNA (Deoxyribonucleic Acid) analysis is very much similar to fingerprinting but instead of studying finger or foot prints found in the crime scene samples of biological evidences such as hair, […]

DNA replication

The process of DNA replication follows a semi-conservative scheme which generates a double helical strand that is composed of one original and one new DNA strand. The semi-conservative scheme of DNA replication was finalized after several years of analysis of the DNA molecule. In order to solve the topological problem of unwinding the DNA double […]

DNA Molecule

I. Significance of Nitrogenous Bases in the Structure of a DNA Molecule: The monomers that make up nucleic acids are called nucleotides. Each nucleotide is composed of three parts. One part is a five-carbon sugar and linked to one end of the sugar in both types of nucleic acid is a functional group called a […]

DNA is the Molecule of Heredity

DNA molecule is the genetic material in which differences in amounts of the compounds adenine, thymine, guanine and cytosine determines the characteristic of the organism. However, before it was identified as the molecule of heredity, the scientists were greeted with skepticism until further findings showed that DNA really is the molecule of heredity. In 1869, […]

DNA Identification In Mass Fatality

In the past decade, forensic science has been recognized as a powerful field due to its significance as supporting evidence in criminal cases. The development of techniques in handling and analysis of deoxyribonucleic acid (DNA) samples has influenced police investigators to rely on any information forensic science can offer. The combination of DNA analysis with […]

DNA and Patterns of Inheritance

The genetic information of all living things is contained in the polymeric molecule known as deoxyribonucleic acid (DNA). This linear chain consists of three components- sugar, phosphate and nucleotide base. The chemical composition of the sugar in DNA is 2’-deoxyribose and the nucleotide bases are of four kinds—adenine (A), cytosine (C), guanine (G) and thymine […]

DNA Analysis And CODIS

Most people have heard of DNA. If not on the current, popular television shows like CSI, then most likely on the plethora of shows that display crime cases that are real. Nowadays, DNA analysis is considered the paramount method in determining biological relationship as well as a key component in solving crimes. Because everyone’s DNA […]

Dna Barcodes of Life

The idea for DNA bar-coding first started in 2003 with a Canadian scientist Paul Hebert at the University of Guelph. He and his research group wrote a paper titled “Biological identifications through DNA barcodes”. In this paper he suggested a way scientist could identify certain species of animals and plants. He suggested scientist could call […]

Summary: Golden Rice

One of the applications of recombinant DNA technology in enriched foods field is golden rice. The organism used is daffodil or maize, bacteria Erwinia uredovora and Escherichia coli. The insertion of phytoene synthase (psy) gene from daffodil or maize and phytoene desaturase (crt I) from Erwinia uredovora into rice genome reintroduced carotenoid biosynthetic pathway in […]

DNA finger printing

Deoxyribonucleic acid (DNA) is a thread of molecules that are part of the cell structure which are commonly found in the nucleus of the cell. It is referred to as “genetic fingerprint” simply because each and every individual has different DNA except for identical twins who have the same set of DNA patterns. Each individual […]

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