Gregor Mendel was a Augustinian monk that taught the subject of science to high school children. Around his teaching he noticed that traits in peas and mice were inherited in certain numerical ratios. Mendel derived through study that hereditary factors do not combine but are passed whole and only half of the parent’s hereditary factors pass to the offspring. Also different offspring from the same parents receive different sets of hereditary factors. His findings became the base of what is known as modern genetics.