Question

question 2
gene mutations can arise when nucleotides are.
a added to the gene.
b taken away from the gene.
c changed within the gene.
d mismatched within the gene.
e all of the above.

Explanation:

Gene mutations can occur through nucleotide - addition (insertion), removal (deletion), substitution (change), or mismatch during DNA replication or due to other factors.

Answer:

E. All of the above