Semi-conservative replication is the mechanism by which DNA replicates in cells. The The parent strand splits in two and uses itself as a template to form a second complementary strand. The exposed bases on the single stranded DNA complementary base pair to nucleotides. A (Adenine) pairs with T (Thymine) and C (Cytosine) pairs with G (Guanine). Together the template strand and the complementary strand bond together to form a new double strand of DNA. One parent double strand of DNA will thus become two daughter double strands of DNA .
The term "semi-conservative" refers to the fact that each of daughter double helix contains one conserved strand from the parent DNA, as well as one newly synthesised strand. 
- ↑ Alberts et al. Molecular biology of the cell fifth edition 2007. Page 266
- ↑ Hartl, D and Jones, E (2009). Genetics- Analysis of genes and genomes. 7th ed. Sudbury: Jones and Bartlett publishers, Inc. 192.
- ↑ Alberts et al. Molecular biology of the cell fifth edition, 2007. Page 268
- ↑ http://www.nature.com/scitable/topicpage/Semi-Conservative-DNA-Replication-Meselson-and-Stahl-421