Characteristics Of Blood
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24 Terms
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What does the term presumptive mean?
Used to determine if a stain at a crime scene could be blood
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Why are many of the tests used to identify blood only considered to be presumptive?
There is a high chance of false positives, especially if other stuff w/ metal ions is present
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Hemastix Test
Hemoglobin - turns bluish/ green
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Luminol
Iron - Turns Black
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Hydrogen Peroxide
Iron - Creates Bubbles
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Kastle MeyerTHe
Hemoglobin - turns hot pink
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What chemicals were used for the Kastle Meyer test?
Ethanol, phenolpthanein, hydrogen peroxide
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What does the term agglutinate mean>
The clumping of blood when cutigens + antigens react
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There are antibodies in the blood found
In the serum portion
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What happens if a person with type AB blood is given a transfusion for type A blood
They will be fine because they already have A - Antigens and people with AB blood do not make any antibodies
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A woman has a blood type of O, but her mother was blood type A and her father was blood type B. How is this possible?
Mom and Dad each carried all O allele
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Why can a person with A blood donate to a person with AB blood but the reverse is not true
Because a person with A blood make Anti- B antibodies so the person with A blood would be rejected
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What is the universal acceptor
AB +
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What is the universal donor
O -
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Is blood type considered class or individual evidence?
Class because only 8 blood types for billions of people
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What component makes up the biggest % of our blood
Plasma - 55%
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What is the most common blood type
O+
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What happened in the Mya Lyons case
Father convicted of killing his daughter after blood was found in the air vents of his van
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What happened in the Chris Vaughn case
Oswego dad who killed wife and three kids shooting them
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Summarize the OJ Simpson case
Not guilty of brutally stabbing ex-wife Nicole Vrown and her friend Ron Goldman
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What is a secretor?
Antigens found in other body fluids along with the blood
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What test can determine whether blood is human or animal?
Precipitin
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What is the basis for a precipitin test
Inject human blood into rabbits
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Why is the serum used in this test called human antiserum
Because it is made of antibodies that would attack human blood
Note 
Flashcards (30)