What does the term 'semi-conservative' refer to in DNA replication?

The term 'semi-conservative' in DNA replication refers to the mechanism by which DNA strands are duplicated. In this process, each newly synthesized double helix consists of one original strand from the parental DNA molecule and one newly formed strand. This means that during replication, the two strands of a DNA molecule separate, and each serves as a template for the formation of its counterpart. As a result, the daughter DNA molecules retain one original strand, ensuring that genetic information is conserved while also introducing new complementary bases to form a complete DNA strand.

This mechanism is crucial for maintaining the integrity of genetic information across generations of cells, as it helps to prevent significant mutations and preserves the sequence of nucleotides. The fact that each daughter strand contains one of the original strands ensures continuity and fidelity in genetic inheritance.