Blog #13 DNA

Blog #13 How has DNA changed how we investigate crimes? What are the two main tests? Describe them

First of all, DNA changed how we investigate crimes drastically compared from before like the 1700s. DNA testing can help women to investigate who raped them by doing a DNA testing if they aren't too embarassed too go get checked. However, DNA testing can help other crimes than rape. For example, it can also help the people who got robbed in their house by seeing if the robber might have left their DNA: their hair, skin cells, saliva, etc. in the house somewhere. DNA has lots of use at a day like this. It can also see if any student touched their teacher's desk so stay away from their stuff when you are suppose to because the teacher can do a DNA testing on her table when she wants to...! Scary, isn't it? DNA helped solve lots of crimes in these modern day; it also helps some other stuff like helping children finding their parents or seeing if that is their biological parent. Therefore, it can also help people see if a person's blood type matches with someone elses to save their life. DNA saves lives, maybe even me someday!!! DNA testing cannot be 100% true, but it can be 99.9% true.

The two main tests of DNA are PCR and RFLP. PCR stands for polymerase whereas RFLP stands for restriction fragment length polymorphism. PCR is a naturally occuring enzyme, a biological macromolecule that catalyzes the formation and repair of DNA. This PCR, differs in reliability and effectiveness and this DNA testing allows you to make multiple copies of a DNA sequence in a short period of time. It's what used for electrophoresis for finger printing and etc. RFLP is another main DNA testing, it provides important information such as screening human DNA for the presence of potentially deleterious genes or providing proof to show the innocenece of one person's crime.