Genotype: is the part of the genetic makeup of a cell. The term was coined by the Danish botanist, plant physiologist and geneticist Wilhelm Johannsen in 1903. A genotype is one of three factors that determine phenotype, along with inherited epigenetic factors and non-inherited environmental factors. Not all organisms with the same genotype look or act the same way because appearance and behavior are modified by environmental and growing conditions. Likewise, not all organisms that look alike necessarily have the same genotype.