5. How are fingerprints discovered at crime scenes? A device called (RUVIS) aims UV light at the areas where fingerprints may be. If latent prints are there, it will reflect back the light, to the UV light. Fingerprint powders are another way to find fingerprints that are not visible to the naked eye.
The DNA fragments were then separated after I performed a gel electrophoresis (process used to separate them with gel and an electrical current) When compared, your loved one's DNA did not match the DNA of the bones found. * 4. Suggest reasons why it was helpful to digest each of your samples with two different restriction enzymes? How do the results of your gel reinforce this point? * It gave two different constants to match the unknown DNA to.
Emma Yates UNIT 39: From Crime Scene to Court It is the job of the FSI to find and collect evidence left behind by offenders on the crime scene. Using the latest forensic techniques they look for all sorts of evidence. The FSIs follow several procedures. To stop potential evidence being destroyed, lost or contaminated they preserve and protect the crime scene. FSIs then start to work with the investigating officers.
Beadle and Tatum: Why was Neurospora a suitable choice as an experimental organism? It is easy to obtain and use in a laboratory, mutants are easily obtained by X-ray or UV radiation, new generations can be produced in relatively short time frames, having a haploid genome means any mutation appears in the phenotype and it is easy to control variables for growth, e.g. temperature, food supplies etc. Distinguish between minimal medium and complete medium. Minimal medium is the basic food supply that is needed to support the wild-type mould.
They tell you the differences in chromosomes between males and females, and their appearance in blood of unknown origin is a basis for identifying it as from a female. 2. Two approaches to the investigation are of blood at a crime scene biological approach (serology) and a physics approach (blood splatter or bloodstain pattern interpretation). 3. The investigators first task in investigating suspicious stains is to
Introduction: Drosophila are a tiny fly about 3mm in length and are most commonly found around spoiled fruit. They are very useful in the laboratory due to their ease of breeding and few variable traits. Since genetics was founded as a field of study drosophila have been used as a model organism for research. At first they were studied for the Mendelian principles about dominance, however further research showed the presence and reasons behind mitosis, mutation, gene linkage, meiosis, including other genetic discoveries to be hiding within the chromosomes and genes of this tiny flies as well. The hypothesis for the experiment involving the ebony and vestigial fly crosses is that it would be very hard to attain a fly that is both ebony and vestigial at the same time.
These small spiky spineless sea creatures contains more genes similar with humans than fruit flies and worms. When biologists have a complete map of a sea urchins’ DNA they will have a better understanding on how to cure our deadly diseases. Although sea urchins can’t smell, see or hear they have the same genes(heart) of a human. This article is very important because it could help us cure very dangerous diseases. The discovery of the sea urchins’ genetics might open up a new era or medications and treatments.
Najey Mcduffie March 12, 2012 Biology/ Pd. 4 Mr. McMillian Methods In Which Tapeworms Survive The immune system is made from cells, proteins, tissues, and organs, it is supposed to protect people from germs and microorganisms (2). It usually does a great job at protecting people, but somehow the immune system is unable to detect the tapeworm. Although tapeworms have no digestive system of their own, they acquire nutrients from partially digested food, through their skin as it goes through the person they inhabit. Tapeworms can grow to be at least twenty-two feet in somebody’s body.
Once again, this discovery proves that pain and itch are different. In addition, it is possible to find healing methods for chronic itchiness. Chronic itch is hard to treat. Unlike acute itchy reactions caused by mosquito bites, it is not mediated by histamine, and it also does not respond to antihistamine drugs; however, when Sun and Chen, who discovered GRPR, gave genetically normal mice a drug that blocks GRPR, they found the mice scratched less in response after injections of three itch provoking compounds. It was good sign for treating chronic itch.
Biology DNA Report 1. What is a DNA Profile? Fingerprinting technology, which is known as DNA profiling, can be used to identify individuals. Modern DNA profiling, STR analysis, only needs a few skin cells, a hair root or a tiny amount of blood or saliva. DNA profiling is useful for solving crimes but can also be used to confirm if people are related to each other.