Answer:
The ability of a witness to explain the probability that no other person, except an identical twin, has the same DNA type.
Step-by-step explanation:
In a criminal investigation, DNA analysis often termed as DNA profiling is used in comparing various criminal suspects' DNA profiles to that of the DNA profile gotten from the crime scene in order to determine the possiblity of their involvement in the crime committed .
While, the effectiveness of DNA depends on the ability of a witness to explain the probability that no other person, except an identical twin, has the same DNA type.
It is very crucial in criminal investigation due to the fact that, its result shows a unique code for every person (except twins) and it allows to place a suspect at the crime scene