Answer:
In point mutation, alteration affects only one single nucleotide.
In base substitution mutation, one single nucleotide is swapped with another nucleotide
In frameshift mutation, the addition or deletion of one or more base pairs could lead to shift in the arrangement
In triplet repeat mutation, a base pair repeats until it reaches threshold limit
Explanation:
In point mutation, alteration affects only one single nucleotide. This alteration could be insertion, deletion or substitution of only one single nucleotide.
In base substitution mutation, one single nucleotide is swapped with another nucleotide during the replication process of DNA.
In frameshift mutation, the addition or deletion of one or more base pairs could lead to shift in the arrangement of triple nucleotide bases.
For instance if the base pair is
AAT GCC CGA TCT
If insertion occurs at second base pair, then the frame will shift as below
AAT GAC CCG ATC T….
In triplet repeat mutation, a base pair repeats until it reaches threshold limit and then becomes unstable
