What type of analysis is used to confirm identities through unique biological markers?

DNA analysis is the process that involves examining the unique sequences of nucleotides in an individual's DNA to establish identities. Each person's DNA, except for identical twins, has a unique pattern, making it an invaluable tool for forensic science. This analysis can pinpoint genetic relationships, identify individuals in criminal investigations, and determine biological relationships such as paternity.

In contrast, bacterial analysis focuses on identifying and characterizing bacteria, which may be relevant in different contexts but does not confirm identities of human samples. Amino acid sequencing, while useful in protein studies and understanding biological functions, does not provide the unique identification that DNA does. Blood type classification sorts individuals based on blood group types but is not unique enough to confirm individual identities, as many people can share the same blood type. Therefore, DNA analysis stands out as the most reliable and definitive method for confirming identities through unique biological markers.