FRSC 2600 - TEST 3 EXAM QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS VERIFIED GRADED A++
Unit 10: Trace Evidence
What is Frye v. United States?
Scientific evidence is allowed into the courtroom if it was generally accepted by the
scientific community
What is probative value of physical evidence?
The level at which evidence provides proof of the crime
How did Frye change the way evidence was admitted into the court room?
What is Product Rule?
How often something occurs in nature or the real world
How did Daubert change the way that evidence was admitted into the court
room?
What is Associative Value?
Is used to place a suspect at a crime
What is trace evidence?
Any small pieces of material, man-made or naturally occurring (animal, plant or mineral)
These include hair, fibers, glass, soil, sand, plant material
What questions do you ask when finding trace evidence?
1. What is it?
2. Is it man-made or natural?
,3. What is its source?
4. How common is it?
5. Can it be identified to a single source?
What is the shaft of the hair?
Part of the hair that sticks out of the skin
What is the root of the hair?
Lies below the epidermis
What is the follicle of the hair?
Structure from which the hair grows
What are the three layers of the hair and what is the function of each layer?
1. Cuticle
2. Cortex
3. Medulla (not everyone has a medulla, not every hair has a medulla)
What is the cuticle of hair?
The cuticle is the outermost layer of hair which is covered with scales. Scales also
always point toward the tip of the hair.
What are the scale variations of hair cuticles?
1. Imbricate - Flattening
2. Coronal -- crown like
3. Spinous -- petal like
What is the cortex of hair?
Outer layer made of keratin and imbedded with pigment; also contains air sacs called
cortical fusi. Gives hair it's shape.
, What is melanin?
Pigment granules that give hair its color
What is cortical fusi?
Air spaces, usually found near the root but may be found throughout the hair shaft
What is the medulla of hair?
Inside layer running down the center of the cortex. The medulla is the hair core that is
not always present. The medulla comes in different types and patterns.
What are the different types of patterns of the medulla?
1. Continuous
2. Intermittent or interrupted
3. Fragmented
4. Absent--not present
What is the medullary index for human hair?
1/3
What is the medullary index for animal hair?
1/2
What is the anagen phase of hair growth?
Hair that is growing; lasting up to 5 years
What is the catagen phase of hair growth?
Hair at rest
What is the telogen phase of hair growth?
Hair that is dying; lasting two to six months
What are class characteristics of hair?
COMPLETE SOLUTIONS VERIFIED GRADED A++
Unit 10: Trace Evidence
What is Frye v. United States?
Scientific evidence is allowed into the courtroom if it was generally accepted by the
scientific community
What is probative value of physical evidence?
The level at which evidence provides proof of the crime
How did Frye change the way evidence was admitted into the court room?
What is Product Rule?
How often something occurs in nature or the real world
How did Daubert change the way that evidence was admitted into the court
room?
What is Associative Value?
Is used to place a suspect at a crime
What is trace evidence?
Any small pieces of material, man-made or naturally occurring (animal, plant or mineral)
These include hair, fibers, glass, soil, sand, plant material
What questions do you ask when finding trace evidence?
1. What is it?
2. Is it man-made or natural?
,3. What is its source?
4. How common is it?
5. Can it be identified to a single source?
What is the shaft of the hair?
Part of the hair that sticks out of the skin
What is the root of the hair?
Lies below the epidermis
What is the follicle of the hair?
Structure from which the hair grows
What are the three layers of the hair and what is the function of each layer?
1. Cuticle
2. Cortex
3. Medulla (not everyone has a medulla, not every hair has a medulla)
What is the cuticle of hair?
The cuticle is the outermost layer of hair which is covered with scales. Scales also
always point toward the tip of the hair.
What are the scale variations of hair cuticles?
1. Imbricate - Flattening
2. Coronal -- crown like
3. Spinous -- petal like
What is the cortex of hair?
Outer layer made of keratin and imbedded with pigment; also contains air sacs called
cortical fusi. Gives hair it's shape.
, What is melanin?
Pigment granules that give hair its color
What is cortical fusi?
Air spaces, usually found near the root but may be found throughout the hair shaft
What is the medulla of hair?
Inside layer running down the center of the cortex. The medulla is the hair core that is
not always present. The medulla comes in different types and patterns.
What are the different types of patterns of the medulla?
1. Continuous
2. Intermittent or interrupted
3. Fragmented
4. Absent--not present
What is the medullary index for human hair?
1/3
What is the medullary index for animal hair?
1/2
What is the anagen phase of hair growth?
Hair that is growing; lasting up to 5 years
What is the catagen phase of hair growth?
Hair at rest
What is the telogen phase of hair growth?
Hair that is dying; lasting two to six months
What are class characteristics of hair?
