Must-Know Biotechnology

As the saying goes, "A dragon begets a dragon, a phoenix begets a phoenix, and a mouse's son can dig holes." Why do organisms inherit? Taking a human being as an example, it is just a sperm cell from the father and an egg cell from the mother that are combined together to develop into an embryo, a baby, a child, and an adult step by step. The material connection between the next generation and the previous generation is just two cells. Then a little material connection is enough to determine that the next generation will resemble their parents in terms of appearance, physique, etc. For many years, people have praised the magical creation of nature on the one hand, and on the other hand they have been thinking hard: How does biological inheritance proceed?