Reginald Punnett

he was a British geneticist, he is probably best remembered as the creator of the punnet square a tool still used by biologists to predict the probability of possible genotypes of offspring.

Gregor Johann Mendel

a scientist and Augustinian friar who gained posthumous fame as the founder of the modern science of genetics. To explain the phenomenon,Mendel coined the terms "recessive" and "dominant" in reference to certain traits.