In our daily life, we can often see a phenomenon. In a family, parents are tall, but children are not tall. Both husband and wife are short, but the children are not all short, and some are very tall; If a couple is short, their offspring may be unbalanced, both tall and short. Everyone knows that height is closely related to parents' heredity, but why? Because height is controlled by many genes, such as environmental factors, nutritional status, living habits, work nature and other factors will affect the development of human height. Like the Japanese in our neighboring countries, their height was generally much shorter than that in our country in previous years, but in recent years, their height has greatly surpassed that of their parents, which also shows the interaction between heredity and environment. Experts say it's hereditary.
Environment = individual.
Of course, the influence of environment on heredity is not equally divided. Some heritability is very stable, such as blood type and fingerprints, which cannot be changed. For example, among patients with schizophrenia and asthma, environmental factors account for 20% and genetic effects account for 80%, some of which account for almost the same proportion.
In short, we hope to make maximum use of external environmental conditions to remedy genetic defects and prevent physical and mental defects caused by environmental factors.