Do you know what DNA is?

It is a nucleic acid that carries the genetic instructions necessary for the vital functions and biological development of all organisms and some viruses. The main role of DNA is to store information for long periods of time.
DNA stands for Deoxyribose nucleic acid.

The DNA chain is 22 to 26 Ångström wide, one nucleotide unit is 3.3 Å long. Although each unit is very small, DNA polymers are enormous molecules composed of millions of nucleotides. For example, the largest human chromosome, chromosome 1, is approximately 220 million base pairs long.

Half of the DNA comes from the female individual and half from the male individual. In living things, DNA generally consists of a pair of molecules tightly wound together, rather than a single molecule. Different types of DNA, which is generally seen as a double helix, have been seen today.
These two long threads wind together like ivy, forming a double helix.