DNA-analysis and profiling

DNA Analyzing & DNA Profiles

1 Person has over 20,000 genes, and this is only a tiny part of the DNA. Theres parts of of the DNA molecules have small areas on the human body that varies from each individual, so no person has the same type, for example, a fingerprint. Small areas like this are used to identify people.

DNA Profiles

DNA profiles are used to determine your identity. For example in criminal cases, DNA is used and matched with other DNAs, or to identify things such as dead people in cases of accidents.

In cases of rape, fragments of the DNA are used and compared to other DNA fragments. This is done by isolating the DNA, copying and cutting it with restriction enzymes. Then, the negatively charged DNA (for example a blod drop) is put through a container with gel with a positively charged end, and the DNA is attracted to the positive side, fragmenting itself through the gel in a way accustomed to the specific DNA (smaller fragments move faster). The DNA fragments can be seen through UV lighting. When compared, you compare the alignments of the different DNAs.