How to understand genetics?

Genetics is a subject that studies the inheritance and variation of biological characters and expounds their laws. Genetics is developed under the impetus of breeding practice. 1900, Mendel's genetic law was rediscovered and genetics began to be established. Later, due to the work of T.H. Morgan and others, a complete cytogenetics was established.

System. Swiss biologist Meshel discovered for the first time that there is a substance with extremely high phosphorus content in the nucleus. Twenty years later, this chemical component was named nucleic acid. Later, through the efforts of many scientists, it was found that there are two kinds of nucleic acids, one is deoxyribonucleic acid, that is, DNA, which has the function of storing and genetic information, and the other is ribonucleic acid, abbreviated as RNA, which plays an important role in the expression of genetic information. From 65438 to 0953, the molecular structure of genetic material DNA was revealed and genetics went deep into the molecular level. The progress of genome project, the transmission of genetic information from genome and protein group to metabonomics, and the research of cell signal transduction and gene expression regulation network, the concept, vocabulary and principle of systems genetics were put forward and published in Chinese Academy of Sciences 65438-0995. The transmission of genetic information and the regulation mechanism of genes have been gradually understood. Genetics theory and technology are playing an important role in agriculture, industry and clinical medicine practice, and occupy an important position in all branches of biology. Many problems in biology, such as the mechanism of individual development and biological evolution, the formation of species and the concept of population, must be deeply understood by applying the achievements of genetics.