遗传,变异,实验动物 z-bo 2020-07-28 631

　　In order for a species to survive in nature, it must reproduce, produce organisms similar to itself, and ensure that the species is passed on from generation to generation. This consistency between morphology, characteristics and physiology of the next generation is called inheritance. Inheritance is a common phenomenon in the life world. At the same time, there are some differences between offspring and previous generations and between individual offspring. This difference between the offspring and the siblings of the previous or offspring is called mutation, which is another important feature of biology.

　　There are different types of

　　mutations, some can be inherited, and some cannot. Mutations with altered genetic material may be inherited, while mutations with no altered genetic material are not. Mutations are the result of changes in the genetic basis of animals. Heredity and mutation have very important significance in biological evolution. There are no mutations. Genetics is just machine duplication. Biology does not evolve and cannot adapt to changes in the environment. Once it encounters unfavorable environmental conditions, biology may become extinct: inheritance and mutation without traits will not be passed on to future generations, and evolution will lose its basic foundation. The continuous cycle of biological mutation, heredity, mutation and reinheritance is the basic engine of biological evolution and the basis of species diversification. Genetics is the science of studying biological heredity and mutation.

　　Experimental animal genetics is the application and development of the basic principles of genetics in laboratory animal science. The reproduction of animal inbred lines, the testing of genetic quality, the standardization of laboratory animals, the maintenance of special genes, the development of genetically engineered mice, and the research of functional genes are all based on genetics.