You are attempting to link an individual to a crime.The only evidence you have is a tiny drop of blood.How can you use this drop of blood to definitively make the association?
A)You can use the sample to determine the individual's blood type.
B)You can use gel electrophoresis to determine the length of the DNA found in the sample.
C)You can use PCR to increase the amount of DNA available for STR analysis.
D)You can use the sample to check for the presence of the Rhesus factor.

Question

Quizplus · Accepted Answer

Polymerase chain reaction (PCR) can amplify small amounts of DNA, making it possible to conduct STR (short tandem repeat) analysis. STR analysis compares the number of repeats of certain DNA sequences between individuals, providing a much stronger link between an individual and a crime than blood type or the Rhesus factor. Gel electrophoresis can also be used to visualize the results of STR analysis.

You Are Attempting to Link an Individual to a Crime