DNA fingerprinting: A term for DNA typing. The chemical structure of everyone's DNA is the same. The only difference between people (or any animal) is the order of the base pairs. There are so many millions of base pairs in each person's DNA that every person has a different sequence.enetics: The study of the patterns of inheritance of specific traits. Genome: All the genetic material in the chromosomes of a particular organism; its size is generally given as its total number of base pairs.