Answer:
It could happen through mutation
Step-by-step explanation:
A segment of DNA after many cell divisions could have more base pairs than it originally did as a result of mutation.
Mutation is generally defined as a sudden change to the DNA sequence of a cell. This change could be of difference forms, including:
- Addition of bases
- Deletion of bases
- Substitution of bases
Addition of bases to a DNA will generally lead to a longer base pairs in the DNA, deletion will lead to a shorter base pairs while substitution will only lead to a change in the base sequence without any change in the length of the DNA.