Question

Which process could a forensic scientist use to analyze a DNA sample from a crime scene to identify a criminal?
A.Y-chromosome analysis
B.recombinant DNA technology
C.DNA fingerprinting
D.paternity testing

Answer 1

Lets see what each options means first.

>Y-chromosome analysis, now the human Y-chromosome is one of the smallest in the genome, and it's passed only from father to son,this helps in you cases where there is a sexual assault but if there are several male suspects, then this is a very useless analysis to carry out as it could be just about anybody from the several male suspects.

>Recombinant DNA technology, this is a irrelevant laboratory procedure that has nothing to do with an investigation.In simple words recombinant DNA, takes a piece of one DNA, combining it with another strand of DNA, so knowing this, with common sense you should be able to rule this option out.

>DNA fingerprinting, now this is a very likely option, because if you have read about the procedure about gel electrophoresis, you should know that if you have a list of suspects and you have gathered DNA sample from the crime scene and if it matches with your suspect, you can most likely identify the criminal.

>Paternity testing,can determine whether or not a particular man is the biological father of a child. This could be an option but then again, this could also be useless as the father of the criminal may not be available or dead.

DNA fingerprinting seems like a logical choice of answer for the question, in my opinion.