Believe it or not, but this pea plant holds the secrets of heredity. A monk named Gregor Mendel studied pea plants like this one in the 1800s. From his research, he discovered how parents pass traits to their offspring. Mendel's discoveries apply to you as well as to peas. In fact, they apply to all living things that reproduce sexually. In this chapter, you'll read about Mendel's experiments. You'll also learn the secrets of heredity he discovered.