The relationship between DNA and genes is that DNA fragments with genetic information are called genes, and other DNA sequences are not genes. Some of them work directly with their own structures, while others are involved in regulating the expression of genetic information.

Each chromosome contains only 1~2 DNA molecules, and each DNA molecule has multiple genes, and each gene contains hundreds of deoxynucleotides.

Deoxyribonucleic acid is an organic compound with complex molecular structure. As a component of chromosome, it exists in the nucleus. Its function is to store genetic information. DNA molecules are large and consist of nucleotides.

Genes (genetic factors) are all nucleotide sequences needed to produce polypeptide chains or functional RNA. Genes support the basic structure and expression of life. It stores all the information about race, blood type, gestation, growth and apoptosis of life.

Extended data:

Since the discovery of RNA virus, genes exist not only in DNA, but also in RNA. Because different genes have different sequences of deoxynucleotides (base sequences), different genes contain different genetic information.

Except for some viruses whose genes are composed of ribonucleic acid (RNA), most biological genes are composed of deoxyribonucleic acid (DNA), which are linearly arranged on chromosomes.

Baidu encyclopedia -DNA

Baidu encyclopedia-gene