gen-briefly-explain-dna-replication-and-one-common-misconception-52f2

Briefly explain DNA replication and one common misconception about it.

## DNA Replication Brief Explanation DNA replication is the process where a cell copies its entire genome before dividing. The double helix unwinds, and each strand serves as a template for creating a new complementary strand. Enzymes called DNA polymerases add nucleotides that pair with the template (A with T, G with C), resulting in two identical DNA molecules, each containing one original strand and one new strand. ## Common Misconception **Misconception:** DNA replication is perfectly accurate and produces exact copies every time. **Reality:** DNA replication actually makes mistakes at a rate of about 1 error per billion nucleotides copied, even with proofreading mechanisms. While cells have repair systems that catch most errors, some mutations slip through. This imperfection is actually crucial—it's the source of genetic variation that drives evolution. If replication were perfect, there would be no genetic diversity and no evolution.