Gregor Mendel pod shape, unripe pod color, flower location, and plant height. He first focused on seed shape, which was either angular or round. Between 1856 and 1863 Mendel cultivated and tested some 28,000 plants, the majority of which were pea plants ("Pisum sativum"). This study showed that, when true-breeding different varieties were crossed to each other (e.g., tall plants fertilized by short plants), in the second generation, one in four pea plants had purebred recessive traits, two out of four were hybrids, and one out of four were purebred dominant. His experiments led him to make two generalizations, the Law of
Adoption detective their parents is information that has been used since prehistoric times to improve crop plants and animals through selective breeding. The biological science of genetics, which began with the work of Gregor Mendel in the mid-nineteenth century, seeks to understand the process of inheritance and the physical basis for heredity in our DNA. What is known about human traits inherited through patients' families can save their lives—that is why gathering a person's complete and accurate medical family history is extremely important even as genetic medicine continues to explain more diseases. Many advances in biological medical science are anticipated in the