The Procedure Of DNA Fingerprinting In Paternity Cases

DNA fingerprinting is a test to identify and evaluate the genetic information called DNA in a person’s cells. This dna fingerprinting process was found in 1984 by a british geneticist Alec Jeffreys. The procedure she had invented for DNA fingerprinting was that it consists of first obtaining a amount of cells, such as skin, hair, or blood cells, which all contain some type of DNA. the DNA is then cut into specific points along the strand with proteins known as the restriction enzymes. The enzymes then produce fragments of specific lengths that were sorted by placing them on a gel and then subjecting the gel to an electric current. When the DNA was then double sorted they placed it in a blotting technique in which they were transforming into single strands and then they would put them in a nylon sheet. …show more content…
In crime cases it can be used in two ways, where a suspect is identified, a little sample of that person’s DNA can be compared from the evidence they have at a crime scene. The results of the comparison can be used to find out if the suspect actually committed the crime he is being accused of or not. When they use DNA fingerprinting in paternity cases, it is to determine if two people have the same DNA sequence in their blood. For example if a mom wants to figure out if her father is actually her father, she would have to get a DNA fingerprint and they will check in a lab and if it comes out positive it means it is his daughter. DNA can be used in many other ways. Many people deal with DNA every day of their lives and they don’t even realize it. the sequence of DNA is A,C,G,T,C, the way they make the dna fingerprints by first isolating the DNA and then you cut,size, and start sorting, the third step to make DNA is transfer DNA to nylon, the 4-5 step is probing the dna, and last but not least is the dna