What are the advantages of using PCR as a technique versus u

What are the advantages of using PCR as a technique versus using older methods like blood typing or RFLP analysis for identifying individuals? Your neighbor\'s daughter is in 6^th grade. She hears that you are taking her Forensics. She asks \"Why is my DNA different from everyone else? Answer in simple terms but completely.

Solution

Usually in any forensic investigation, the DNA that is acquired for investigation is very small. The other methods of identifying the individual requires a large quantity of DNA while PCR (polymerase chain reaction) requires only a small quantity of DNA. PCR amplifies the small quantity of the available DNA. The other advantage of PCR is that it would make several copies of DNA in a shorter duration when compared to other methods. Your DNA is unique and different from everybody else because each person gets a random mix of genes from the father and mother and this mix is random and never the same.