User:Lmurray2007

Hi what you are going to be looking at is my Science homework all on CSI-Crime Scene Investigator. This what you will be reading about; Week 1 Fingerprints Week 2 Blood Types Week 3 DNA Fingerprinting Week 4 Chromatography Week 5 Microscopes Week 6&7 Case Study (looking at how a particular crime solved)

Week 1: Fingerprints

A fingerprint is an impression of the friction ridges of all part of the finger. A friction ridge is a raised portion of the on the palm or fingers and toes or sole skin, consisting of one or more connected ridge units of friction ridge skin.These ridges are sometimes known as "dermal ridges" or "dermal papillae". Fingerprint identification is the process of comparing questioned and known friction skin ridge impressions from fingers or palms to determine if the impressions are from the same finger or palm.

week 2: blood types

A blood type (also called a blood group) is a classification of blood based on the presence or absence of inherited antigenic substances on the surface of red blood cells (RBCs). These antigens may be proteins, carbohydrates, glycoproteins, or glycolipids, depending on the blood group system, and some of these antigens are also present on the surface of other types of cells of various tissues.

week 3: DNA Fingerprinting

DNA profiling (also called DNA testing, DNA typing, or genetic fingerprinting) is a technique employed by forensic scientists to assist in the identification of individuals on the basis of their respective DNA profiles.

Although the vast majority of human DNA sequences are common in humans, DNA profiling makes use of highly variable repeat sequences, called variable number tandem repeats (VNTR). These loci are highly similar between very closely related humans, but variable enough so that it is extremely unlikely for unrelated humans to have the same alleles.

week 4: Chromatography

Chromatography may be preparative or analytical. Preparative chromatography seeks to separate the components of a mixture for further use (and is thus a form of purification). Analytical chromatography normally operates with smaller amounts of material and seeks to measure the relative proportions of analytes in a mixture. The two are not mutually exclusive.

week 5: Microscopes

The science of investigating small objects using such an instrument is called microscopy. The term microscopic means minute or very small, not visible with the eye unless aided by a microscope.

week 6&7: knife crime

Knife crimes most common in london. Group of gangs sometime carrie knives,guns and many more. If you stab or shot someone you will get put in jail for a few years.The police are searching groups for gun,knives and many more.