DNA Replication
DNA replication is the process by which cells duplicate their DNA before cell division. It is an essential step in gene expression, as it ensures that each new cell receives a complete set of genetic information. During DNA replication, the double helix structure of DNA is unwound and separated into two strands. Each strand then serves as a template for the synthesis of a new complementary strand, resulting in the creation of two identical DNA molecules. This process is carefully regulated to ensure accurate duplication of genetic material and prevent errors that could lead to mutations. In the context of science, genetics, and gene expression, DNA replication plays a crucial role in maintaining the integrity of genetic information and enabling the transmission of inherited traits from one generation to the next.