Colligative properties are those properties of solutions that depend on the number of dissolved particles in solution, but not on the identities of the solutes. For example, the freezing point of salt water is lower than that of pure water, due to the presence of the salt dissolved in the water.
Shares & Saves. Save. DNA testing evolved from the study of genetics, which began in the late 1800s when Gregor Mendel first studied the phenomenon of inherited traits in pea plants. His work laid the foundation for the discovery of DNA, or deoxyribonucleic acid, the molecules that contain our genetic makeup.
Introduction to DNA Testing History. 1  1920âs: Blood Typing. 2  1930âs: Serological Testing. 3  1970âs: HLA Testing. 4  1980âs: RFLP DNA Testing. 5  1990âs: PCR DNA Testing. 6  2000âs: SNP Arrays. 7  2010âs: Next Generation Sequencing. 8  DNA testing is a powerful tool for identification. With todayâs technology, DNA tests can now identify individuals with almost 100% certainty. Identification has not always been this conclusive. Before DNA tests, the scientific community used other biological tools to identify people and determine biological relationships.