Factual error: When Dexter is in the hospital as a child, the doctor says that Dexter has a very rare blood type, AB negative. Although it's very rare, the people with AB- can receive donor blood with A-, B-, AB- and 0-. AB- is a very good blood-type when you need to receive blood. While it is true that hospitals normally have to use AB- because of the complexity of other proteins (and to prevent adverse reactions), in case of an emergency, like Dexter's, and a shortage, a hospital will use a blood type close enough to not likely cause a reaction. In this situation, the hospital would give Dexter O-, B-, or A- instead as blood loss would normally kill a patient long before a suitable donor could be located, called in, admitted to the hospital, and have the transfusion set up. (00:31:00 - 00:32:00)
Dexter (2006)
1 factual error in Father Knows Best
Starring: James Remar, Michael C. Hall, Jennifer Carpenter, David Zayas
Dirty Harry - S4-E5
Continuity mistake: When Dexter listens to Officer Lundy's tape recording, we hear Lundy say that the Trinity killer's weight is 190 to 200 pounds. When we saw him recording that, he said 200 to 220 pounds.
[MC Hammer's "U Can't Touch This" playing.]
Former Classmate: Come on, Dexter. It's hammer time.
Dexter: [internally] I have no idea what hammer time is. Or how it differs from regular time.
Question: Dexter tests the blood on Miguel's shirt, to see if it's Freebo's. It looks like he's just using a DNA sequencer and the blood result comes back "bovine." Can a DNA sequencer differentiate which species the blood came from like that? Or perhaps he was using a different type of blood analysis machine? Is there an analysis machine that's capable of that? I thought the way to test if blood is human or not, "anti-human serum" is mixed with the blood to see if it will clot. So wouldn't the only way to tell it was bovine blood is to inject it with "anti-bovine serum"?
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Answer: The short answer is yes, it could. but, it would have to be set up to analyze results to differentiate species. The sequencer will report the base pairs for any properly prepared sample, but interpreting the results is a software package. The software is available, but I would think it unlikely that an analysis package used in a forensics lab would have the capability to be so specific. More likely it would report "Non Human Sequences Found."