1. 8.3 DNA replication

2. DNA Replication Each human body cell contains 46 chromosomes.
Whenever a cell undergoes mitosis, the new cells have to also have 46 chromosomes.
That is why DNA has to be replicated (copied) before the cell divides.

3. Replication Fork

4. DNA Replication Steps
The DNA double helix unwinds and unzips (using enzymes) at several points to form replication forks.
The two strands/chains separate.
Nucleotides that are complementary to the template strand are brought and stuck together using DNA polymerase. (using base-pairing rule)

5. The result is two new DNA molecules that are identical to each other and to the original DNA molecule.

6. DNA Replication