Question 1

For standard/reference hair sampling from a victim,the collection of a minimum of ________ full-length head hairs and ________ full-length pubic hairs is recommended.

Accepted Answer

A)   50; 25
B)   100; 100
C)   20; 20
D)   5; 16E) A) and C)
F) B) and D)

Question 2

A criminalist is most likely to collect DNA from hairs in the catagen stage.

Accepted Answer

A) True 
 B)False

Question 3

Which step in the examination of fibers would logically be taken first?

Accepted Answer

A)   Examination of dye composition using visible light microspectrophotometer
B)   Make a cross sectional view of the fibers
C)   Microscopic examination for color and diameter of fibers
D)   Infrared spectrophotometryE) B) and C)
F) A) and B)

Question 4

The scale pattern of the cuticle is an important feature for characterizing ________ hair.

Accepted Answer

The answer of The scale pattern of the cuticle is...

Question 5

Name the three phases of hair growth.A criminalist is more likely to collect DNA from hairs in which stage of growth?
 Why?

Accepted Answer

Answer (should include points such as):
...

Question 6

Which is NOT a synthetic fiber?

Accepted Answer

A)   Rayon
B)   Polyester
C)   Acrylic
D)   All of the above are syntheticE) A) and C)
F) A) and D)

Question 7

Most animals have medullae that are either continuous or interrupted.

Accepted Answer

A) True 
 B)False

Question 8

Before the 20th century,all fibers were:

Accepted Answer

A)   Natural.
B)   Regenerated.
C)   Synthetic.
D)   Derived.E) A) and C)
F) C) and D)

Question 9

If a hair does not have a follicular tag,an expert witness is on best scientific footing when stating that:

Accepted Answer

A)   The hair in question comes from a 21-year-old.
B)   His examination reveals that the hair is that of a male.
C)   The given hair comes from a specific person.
D)   A suspect hair comes from a particular animal species.E) C) and D)
F) B) and D)

Question 10

In determining whether a hair sample originated from a male or a female,the MOST important consideration is:

Accepted Answer

A)   Whether the hair is bleached.
B)   The results of DNA analysis performed on the root structure.
C)   Whether the hair was dyed.
D)   The length of the hair.E) B) and D)
F) A) and B)

Question 11

A fiber whose microscopic appearance includes being ribbon-like in shape (flat) with twists at irregular intervals is:

Accepted Answer

A)   Polyester.
B)   Cotton.
C)   Kapok.
D)   Linen.E) B) and C)
F) C) and D)

Question 12

In comparing hairs,what aspects of the hair is the criminalist particularly interested in matching?
 Name at least one other important feature that the criminalist might compare.

Accepted Answer

Answer (should include points such as):
...

Question 13

A criminalist is more likely to obtain DNA from hairs in the:

Accepted Answer

A)   Anagenic stage.
B)   Catagenic stage.
C)   Telogenic stage.
D)   Terminal stage.E) C) and D)
F) A) and D)

Question 14

The conviction of Ennis Cosby's killer was aided by the DNA analysis on a hair that was crucial evidence in the case.This hair:

Accepted Answer

A)   Belonged to Cosby and was found in the suspect's car.
B)   Belonged to the killer and was found in his cap with which he had wrapped the murder weapon before discarding it.
C)   Belonged to Cosby and was found clinging to the murderer's jacket.
D)   Belonged to the killer and was found on the body of the victim.E) B) and C)
F) C) and D)

Question 15

The scale pattern of the cortex is an important feature for characterizing animal hair.

Accepted Answer

A) True 
 B)False

Question 16

Name and briefly define the three layers of the hair shaft.

Accepted Answer

Answer (should include points such as):
...

Question 17

Which would involve determining the refractive index of the fibers?

Accepted Answer

A)   Microscopic examination for color and diameter of fibers
B)   Infrared spectrophotometry
C)   Study of the birefringence of the fibers
D)   TLC study of dyes in fibersE) C) and D)
F) B) and D)

Question 18

The number of hair scales pointing towards the tip of the hair is ________ the number of hair scales pointing towards the hair follicle.

Accepted Answer

A)   The same as
B)   Less than
C)   Greater than
D)   None of the aboveE) A) and B)
F) B) and C)

Question 19

The ________ is the main body of the hair shaft.

Accepted Answer

The answer of The ________ is the main body of...

Question 20

Hair tends to exhibit variable morphological characteristics,not only from one person to another but also within a single individual.

Accepted Answer

A) True 
 B)False

Exam 11: Hairs and Fibers

Which would involve determining the refractive index of the fibers?

Correct AnswerverifiedShow Answer

Before the 20th century,all fibers were:

Correct AnswerverifiedShow Answer

The conviction of Ennis Cosby's killer was aided by the DNA analysis on a hair that was crucial evidence in the case.This hair:

Correct AnswerverifiedShow Answer

A fiber whose microscopic appearance includes being ribbon-like in shape (flat) with twists at irregular intervals is:

Correct AnswerverifiedShow Answer

The ________ is the main body of the hair shaft.

Correct AnswerverifiedShow Answer

The scale pattern of the cortex is an important feature for characterizing animal hair.

Correct AnswerverifiedShow Answer

A criminalist is most likely to collect DNA from hairs in the catagen stage.

Correct AnswerverifiedShow Answer

A criminalist is more likely to obtain DNA from hairs in the:

Correct AnswerverifiedShow Answer

In comparing hairs,what aspects of the hair is the criminalist particularly interested in matching? Name at least one other important feature that the criminalist might compare.

Correct AnswerverifiedAnswer (should include points such as):...View AnswerShow Answer

Which is NOT a synthetic fiber?

Correct AnswerverifiedShow Answer

For standard/reference hair sampling from a victim,the collection of a minimum of ________ full-length head hairs and ________ full-length pubic hairs is recommended.

Correct AnswerverifiedShow Answer

Hair tends to exhibit variable morphological characteristics,not only from one person to another but also within a single individual.

Correct AnswerverifiedShow Answer

Which step in the examination of fibers would logically be taken first?

Correct AnswerverifiedShow Answer

Name the three phases of hair growth.A criminalist is more likely to collect DNA from hairs in which stage of growth? Why?

Correct AnswerverifiedAnswer (should include points such as):...View AnswerShow Answer

Most animals have medullae that are either continuous or interrupted.

Correct AnswerverifiedShow Answer

The number of hair scales pointing towards the tip of the hair is ________ the number of hair scales pointing towards the hair follicle.

Correct AnswerverifiedShow Answer

The scale pattern of the cuticle is an important feature for characterizing ________ hair.

Correct AnswerverifiedShow Answer

In determining whether a hair sample originated from a male or a female,the MOST important consideration is:

Correct AnswerverifiedShow Answer

Name and briefly define the three layers of the hair shaft.

Correct AnswerverifiedAnswer (should include points such as):...View AnswerShow Answer

If a hair does not have a follicular tag,an expert witness is on best scientific footing when stating that:

Correct AnswerverifiedShow Answer

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Answer (should include points such as):
...
View Answer

Correct Answer
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For standard/reference hair sampling from a victim,the collection of a minimum of full-length head hairs and full-length pubic hairs is recommended.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
Answer (should include points such as):
...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Answer (should include points such as):
...
View Answer

Correct Answer
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