There is one DNA molecule on a chromosome and more than 100,000 genes on a DNA molecule. DNA is also known as deoxyribonucleic acid, and DNA contains the relevant genetic information necessary for the synthesis of RNA and proteins, and plays an important role in the maintenance of growth, development and normal functioning of organisms. Genes, also known as genetic elements in medicine, are all the nucleotide sequences that can express and produce proteins and RNA, and have the basic structure and properties to support life, while storing all the information about life’s blood type, conception, growth, apoptosis, etc., and possessing the characteristics of stability and variability. Genes are segments of DNA with genetic information, the basic unit of inheritance that controls traits, and each DNA molecule contains multiple genes.