Blood
Charcteristics
Blood Facts/Terminology
Blood as Evidence
Blood Types
Random
100
Fluid portion of blood
plasma
100
For every 600 red blood cells there are approximately how many white blood cells
one
100

Series of questions asked by evidence technician when a spot of fluid is found at a crime scene. (In order)

Is it blood?, What species?, Is it human?

100

Protein marker other than ABO

Rh

100
Cell found in blood that can not be used for DNA testing
Red Blood Cells - no nucleus
200
Three cells found in blood
Red blood Cells, White blood Cells, Platelets
200
Substance found on red blood cells (foreign body which helps to denote blood type)
antigen
200

Two presumptive tests used to determine if a spot found at a crime scene is blood

Kastle-Meyer and Hemastix

200

small drops of blood that break off from the parent spatter when the blood droplet hits a surface

satellite spatter

200
What blood type is considered to be the "universal recipient"
AB
300
Scientific Name for red blood cells
erythrocytes
300
Having different alleles for the same trait is referred to as...
Heterozygous
300

Test used to determine if blood found at a crime scene is human or animal

precipitin

300

Dad has heterozygous A blood, Mom has homozygous B blood. What are the chances that the kids will have B blood?

50 %

300
Which blood type is least common in the US
AB-
400
Scientific name for white blood cells
leukocytes
400
Clumping of red blood cells (results if two blood types with different antigens are mixed)
agglutination
400

Blood from a crime scene is collected in tubes called____________

vacutainers

400

What antigens are present in a person with type B blood?

B only

400

If a person has type B blood who can they donate blood to?

Type B or O

500
Responsible for blood clotting
platelets or thrombocytes
500
What percent of an average humans body weight does blood make up
7-8%
500

What does blood spatter tell us?

how the crime happened

500

Blood sample clots with anti A but not anti B. What blood type is it?

Type A

500
Blood is used as what type of evidence in the courtroom
circumstantial - argue many points including direction of stains, height of the perpetrator, position of the victim, left/right hand, whether the body was moved, etc.
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