What is the meaning of the phrase “the DNA copies generated will be similar, but may not be identical”?
DNA copies may have slight differences.
During DNA replication, the enzyme DNA polymerase copies the template strand with very high — but not perfect — fidelity. Occasionally a wrong base is incorporated or a base is skipped. These small errors are called mutations and produce copies that are almost but not exactly identical to the parent DNA.
This is what the phrase means: the copies carry the same genetic information overall (making them 'similar') but may differ at one or a few base positions (making them 'not identical'). This is the molecular basis of variation, which drives evolution.
The correct answer is : DNA copies may have slight differences.
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