1. enzymes break the hydrogen bonds that hold the double helix together, the 2 remaining strands unwind and separate. Another enzyme constructs primers: short, single strands of nucleotides.
2. nucleic acid hybridization occurs: base paring between two strands of DNA
3. DNA polymerases attach to the hybridized primers and begin DNA synthesis
4. The enzyme DNA ligase seals any gaps, so the new DNA strands are continuous
5. Both of the two strands of the parent molecule are copied at the same time, As each new DNA strand lengthens, it winds up with its template strand into a double helix