Which statement best summarizes Gregor Mendel's contributions to our understanding of genetics and heredity? A Mendel's insight into the inheritable patterns of plant growth formed the foundation of modern genetics. B Mendel's insight into the structure of DNA formed the foundation of modern genetics. C Mendel's observation of pea seeds formed the foundation of modern genetics.D Mendel's knowledge of cross-pollination formed the foundation of modern genetics. Help quickly please