1. Identify the two old DNA strands, each serving as a template for replication.
2. Recognize that new nucleotides are added to each old strand following complementary base pairing rules (A with T, G with C).
3. Arrange the new strand fragments so that each one is complementary and antiparallel to its corresponding old strand.
4. Ensure each new strand runs in the 5’ to 3’ direction relative to its template.
5. Verify that the final structure shows two complete double helices, each containing one old and one new strand — demonstrating semiconservative replication.
Parent Tip: Review the logic above to help your child master the concept of double helix worksheet.