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.
The first likely description of the disease was in 1841 by Charles Oscar Waters. The condition was described in further detail in 1872 by George Huntington, after whom it is named. The genetic basis was discovered in 1993 by an international collaborative effort led by the Hereditary Disease Foundation.