Because gene-level mutations are more common than chromosomal mutations ... be inserted in place of a guanine nucleotide. With base substitution mutations, only a single nucleotide within a ...

Mutations generally fall into two types: point mutations and chromosomal aberrations ... The most common type of mistake is a point substitution. More uncommon is the failure to copy one of ...

Although the genetic interactions among mutations ... to an amino acid substitution which disrupts the enzyme activity, while ...