Semi-conservative replication

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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). [1]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 [2].

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. 

References

  1. Alberts et al. Molecular biology of the cell fifth edition 2007. Page 266
  2. Hartl, D and Jones, E (2009). Genetics- Analysis of genes and genomes. 7th ed. Sudbury: Jones and Bartlett publishers, Inc. 192.