FORENSICS - SCIENCE IMPORTANCE - REGIONAL LAW ENFORCEMENT
What is Forensic Science?
Chromosomes are tightly coiled up DNA carrying genetic information. Every human has a set of 46 chromosomes, they are also connected in genes determining gender from x and y chromosomes. Those specifically are called sex chromosomes where each individual has 23 which form together eventually after reproduction making 46, but theres also chromosomes used in simple mitosis with cell duplication!
The process of passing on traits from one generation to the next is called meiosis.
Also known as, DeoxyRibonucleic Acid, DNA is a set of instructions that determines a person's characteristics. But, How? Its a hereditary material, formatted with special codes. Theyre made up of a nitrogen base, sugar, guanine, adenine, thymine, and cytosine. DNA bases pair up with eachother. Its all a giant book, having chapters with set rules and codes that go to our looks and etc.!
DNA and Chromosomes Comparisons
What really is Meiosis?
Physical Evidence is anything left behind to connect the offender to a crime seen, but what about biological evidence? It does tie with physical evidence, but its more that the naked eye cannot see, many things can be gathered for physical evidence such as:
- and etc.
All these things get taken to the lab for indentification, DNA is very unique to each person so it helps alot better to identify who was at the scene and what possibly happened. Leading to DNA Identification techniques!
DNA Identification Techniques!
This ties closely to Evidence gathering, now is the next step leading to lab processing! Since only a few cells can be sufficient enough to obtain useful information to help the case, means there's specific items of evidence that you may need to collect, the possible location of the DNA on the evidence, and the biological source containing the cells. Just because you cannot see a stain does not mean there are not enough cells for DNA typing. Source of DNA:
- Sweat, Blood, Tissue, Skin, Dandruff, Hair, etc.
- Weapons, masks/hats, toothpicks, used cigarettes, glasses, blanket/pillow/sheet, fingernail, bitemark, bullets and etc.
Common locations of finding these DNA:
- Surface Area, Tips, Handles, Scrapings, Skin and etc!
The technique is to find whatever you cant, whether you can see evidence or not. DNA is a powerful clue, just take your time and loko thoroughly in the crime scene.