3. How is DNA replication related to cancer

Mistakes in the replication of DNA create cells that become cancerous

DNA replication especially those occurring at regions that are hard to replicate, called fragile sites, can cause breaks in DNA. This can lead to cancer, primarily by making it more likely that fragments of chromosomes rearrange themselves, activating genes that lead to uncontrollable cell division.

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The answer is d. when it begins to fall back to the child's hand