The DNA double helix structure model established by Watson and Crick not only clarifies the structural characteristics of DNA molecules, but also reveals that DNA is a molecule that performs biological genetic functions.

In the process of DNA replication from parents to offspring, the transmission mode and high fidelity of genetic information laid the foundation for genetics to enter the molecular level and became the most brilliant milestone in the development history of modern molecular biology.

Nature is one of the most prestigious scientific magazines with a long history in the world. It was first published on June 4th 1869 165438. Unlike most scientific papers magazines that focus on a particular field, it is one of the few magazines that still publish many first-hand research papers in scientific fields (other similar magazines include Science and Proceedings of the National Academy of Sciences, etc.). ).

Genomic DNA

The genetic information of most organisms in nature is stored in the nucleotide sequence of DNA. DNA is a huge biopolymer, and the DNA contained in jujube chromosome, the carrier of intracellular genetic information, is generally called genome.

The genomic DNA content of the same species is always constant, but the size and complexity of genomes vary greatly among different species. Generally speaking, the higher the degree of evolution, the larger and more complex the genome composition.