Describe two different methods that can be used to assist in solving crimes and missing person
cases. Explain the benefits of each.

1. DNA identification by PCR

2. Forensic entomology

Explanation:

Polymerase Chain Reaction (PCR) is the most widely used technique in molecular biology to identify DNA samples, and it is a method regularly used in criminal cases. The PCR technique enables the amplification of specific genome regions by using a set of oligonucleotides (primers) that pair with the sequence of interest and a Taq polymerase that synthesizes DNA copies that are specific of the person to be identified. PCR reaction consists of several rounds of amplification in order to obtain sufficient DNA product to visualize it.  

Forensic entomology is used in criminology to determine the time period between the discovery of a human body and the time that colonization by insects occurred, thereby providing an estimation of the post-mortem interval in human bodies. In addition, this technique can be used in abuse and other types of criminal cases because insect colonization also provides useful information about the nature of the decomposition processes in one crime scene.

The DNA fingerprinting technique and development and comparison of physical fingerprints can be the methods used for the purpose of solving crimes and identification of missing person.  

The DNA fingerprinting can be done from the physical evidences such as blood, sweat, hair, tissues, teeth and other material obtain at crime scene. These can be compared with the suspects, victim and missing persons so as to establish their identity.

The physical fingerprints can be developed on the scene of crime and compared with the requested specimen from suspect, victim and the missing person or in case of impersonation to establish the desired identity

Explanation:

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