Reason for newly formed DNA copies not being identical:
One reason why newly formed DNA copies may not be identical is due to errors during DNA replication.

Errors during DNA replication:
- DNA replication is a complex process where the DNA molecule unwinds and each strand serves as a template for the synthesis of a new complementary strand.
- Although cells have mechanisms in place to ensure accurate replication, mistakes can still occur.
- One common type of error is a mismatch in base pairing, where an incorrect nucleotide is inserted opposite a template nucleotide. This can lead to mutations in the newly synthesized DNA strand.
- Another type of error is the incorporation of incorrect nucleotides due to environmental factors or exposure to mutagens.
- These errors can result in changes to the genetic code, potentially leading to genetic disorders or diseases.
Overall, errors during DNA replication can contribute to genetic diversity in populations and play a role in evolution. It is essential for cells to maintain the integrity of their DNA through repair mechanisms to minimize the impact of replication errors.

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