DNA replication is described as semiconservative. Which statement best explains what semiconservative replication means after one round of replication?

• A. Each daughter DNA double helix is a mosaic in which both strands are mixtures of old and new DNA segments.
• B. Each daughter DNA double helix contains one parental (old) strand and one newly synthesized strand.
• C. Each daughter DNA double helix contains two parental (old) strands paired together.
• D. Each daughter DNA double helix contains two newly synthesized strands, and the parental DNA remains intact as a separate molecule.

Answer: (B)