The external layer of the human skin is called the epidermis and it replaces itself approximately every 27 days through shedding, which is known as exfoliation. Only this outer or surface layer of skin is replaced during the exfoliation process.
Gregor Mendel, the Moravian Augustinian monk who founded the modern science of genetics. Mendelian inheritance is a type of biological inheritance that follows the laws originally proposed by Gregor Mendel in 1865 and 1866 and re-discovered in 1900. These laws were initially very controversial.
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.