Classical genetics color, flower color and seed shape. Mendel took peas that had differing phenotypic characteristics and test-crossed them to assess how the parental plants passed the traits down to their offspring. He started by crossing a round, yellow and round, green pea and observed the resulting phenotypes. The results of this experiment allowed him to see which of these two traits was dominant and which was recessive based upon the number of offspring with each phenotype. Mendel then chose to further his experiments by crossing a pea plant homozygous dominant for round and yellow phenotypes with a pea plant that was
Christian Carl André Christian Carl André Christian Carl André (1763-1831) was a leading 19th century European natural scientist, publisher, economist and educator. He was among the pioneers in the study of heredity whose vision paved the way for the research of Gregor Mendel, the founder of modern genetics. Christian Carl André was born on 20 March 1763 in the German town of Hildburghausen. He studied at the University of Jena, and worked as a teacher in Eisenach and at the Schnepfenthal Salzmann School in Gotha. Then from 1798 to 1820 he lived in Brno, then within the Habsburg empire, where he headed the