The factors that caused mutation is:
- DNA fails to copy accurately
Most of the mutations that we think matter to evolution are "naturally-occurring."
For example, when a cell divides, it makes a copy of its DNA — and sometimes the copy is not quite perfect. That small difference from the original DNA sequence is a mutation.
- External influences
Mutations can also be caused by exposure to specific chemicals or radiation. These agents cause the DNA to break down. When the cell repairs the DNA, it might not do a perfect job of the repair and thus, caused mutation.
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