Forensic Science

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Creating your own DNA fingerprint helps you to learn about DNA. This process takes about an hour to put together and overnight to set. You need a DNA sample, beakers, a laboratory, restriction enzymes, a gel tray, an electrophoresis apparatus, buffer solution, a staining sheet and a staining tray.

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  • What tools do forensic scientists use?

    Q: What tools do forensic scientists use?

    A: Forensic scientists use various tools to accomplish their tasks including rubber gloves, a head rest, dissection scissors, ropes, and goggles, including arterial and jugular tubes. They also have an autopsy table, autopsy saws, blades and a dissecting knife. Other tools include X-ray boxes, a fingerprint set, an osteometric board, a water bath and post-mortem needles.
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  • How is spectrophotometry used in forensics?

    Q: How is spectrophotometry used in forensics?

    A: Spectrophotometry is used in forensics to identify drugs or other toxins. When identifying an unknown drug or chemical, forensic scientists will use spectrophotometry to analyze how the unknown substance reacts to ultraviolet and infrared light to identify its composition.
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  • How do you create a DNA fingerprint?

    Q: How do you create a DNA fingerprint?

    A: Creating your own DNA fingerprint helps you to learn about DNA. This process takes about an hour to put together and overnight to set. You need a DNA sample, beakers, a laboratory, restriction enzymes, a gel tray, an electrophoresis apparatus, buffer solution, a staining sheet and a staining tray.
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  • Why is forensic science so important?

    Q: Why is forensic science so important?

    A: Forensic science is important because it aids in establishing the guilt or innocence of potential suspects. Forensic evidence is also useful for linking crimes, which establishes the patterns of crimes and also narrows the number of probable suspects.
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  • Q: What is the purpose of funeral embalming?

    A: The purpose of embalming is to preserve the tissues in the body and delay decomposition. Many people choose embalming because it helps the body look more life-like for public viewing purposes at a funeral or memorial service.
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  • What are the different types of toxicology?

    Q: What are the different types of toxicology?

    A: Toxicology includes the fields of forensic, chemical, aquatic, eco- and environmental toxicology, and toxicogenomics. Toxicology is a biological field of study on the harmful effects of chemicals on biological organisms.
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  • Q: What are some types of forensic science?

    A: The field of forensic science includes a number of disciplines, such as anthropology, odontology and toxicology. These experts find, collect and preserve evidence in criminal cases.
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  • Q: What techniques did Alec Jeffreys develop for genetic fingerprinting?

    A: Professor Sir Alec Jeffreys' 1984 development of genetic fingerprinting revolved around a technique that points out the unique nature of an individual's DNA code. He showed that restriction fragment length polymorphism, a variation in chromosome pairs, can occur in over 10,000,000 different places, indicating that a person's genetic code is unique to the point that it can be used for positive identification.
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  • How do you pass a polygraph test?

    Q: How do you pass a polygraph test?

    A: A polygraph test can be passed by manipulating the body's response to control questions. A participant's lies are only considered lies when they register a higher response than control questions. The results can therefore be manipulated in a participant's favor if the participant is able to elicit a higher response to control questions than the relevant questions of the examination.
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  • Q: What is a dissecting microscope?

    A: Dissecting microscopes, also known as stereo microscopes, are scientific instruments used to obtain three-dimensional images of obtained specimens. The microscope trains two different lenses on the specimen in order to obtain the image.
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  • What are the five steps in the scientific method?

    Q: What are the five steps in the scientific method?

    A: According to HowStuffWorks.com, the five steps in the scientific method are make an observation, ask a question, form a hypothesis, conduct an experiment and accept or reject the hypothesis. Various numbers of steps are sometimes used to explain the scientific method, but they all include the same ideas.
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  • Q: What clothes does a forensic scientist wear?

    A: When entering a crime scene, forensic scientists wear protective clothing over their regular clothes to prevent contamination. This may include a full-body suit with a hood, a mask, booties and gloves.
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  • Q: What is a friction ridge?

    A: A friction ridge is most commonly known as the skin that is found on the palms of the hands and the bottoms of the feet. Fingerprints are another name for a friction ridge.
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  • How long do fingerprints stay on objects?

    Q: How long do fingerprints stay on objects?

    A: No scientific methods can determine the length of time for which a fingerprint lasts on an object. There are many factors that determine how long a fingerprint lasts on any surface or object, with environmental conditions being the primary influence on the longevity of the prints.
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  • Q: What are some cases that forensic entomology has been used to solve?

    A: Insects have been used to solve many crimes, including a 1991 "Ken and Barbie" murder and a 1997 murder of two young children. Forensic entomology is the study of insects primarily for medico-legal purposes. The primary purpose of carrying out a forensic entomology study is to estimate the time since death, states the Simon Fraser University Museum of Archaeology and Ethnology.
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  • Q: What is some good information about forensic ballistics?

    A: According to Explore Forensics, ballistics in the area of forensic science deals with firearms as to why and how they are used, most frequently in the practice of murder. Many people do not realize that when a person is shot, the wound and the condition of the victim can tell a lot about the weapon that was used, notes Explore Forensics.
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  • How long does it take for rigor mortis to start after a cat passes?

    Q: How long does it take for rigor mortis to start after a cat passes?

    A: Rigor mortis can take between three to six hours to set in after the death of a cat, according to Rest in Pets. The condition, which is part of the decomposition process, is a natural occurrence after the death of an animal.
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  • What is the most common fingerprint pattern?

    Q: What is the most common fingerprint pattern?

    A: Fingerprints patterns are of three types: arches, loops and whorls, and loops are the most common pattern, being found in 65 to 70 percent of all fingerprints. In this pattern, ridges or curved lines enter from one side of the finger, form a loop and exit from the same side.
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  • Q: How do you obtain DNA for DNA fingerprinting?

    A: To obtain DNA for DNA fingerprinting, a sample of cells from skin, hair, blood, saliva or semen is collected. The white blood cells from the sample are broken open using detergent, and then the usable DNA is separated from all the other cellular material. Subsequently, the extracted DNA is cut into smaller pieces using restriction enzymes.
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  • What is blood spatter analysis?

    Q: What is blood spatter analysis?

    A: Blood spatter analysis is a forensic science involving the study of bloodstain patterns that criminologists use to reconstruct the events of a suspected crime. Analysts examine subtle factors such as the placement, shape and volume of blood to determine the weapon and amount of force used in an attack.
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  • Q: What is a buccal swab test?

    A: A buccal swab test is a method of collecting DNA samples. According to the Laboratory Corporation of America, DNA samples are collected by rubbing the inside of the mouth with cotton-tipped swab. Unlike obtaining DNA from blood, buccal swab tests are non-invasive.
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