Question 1

What are latent prints?

Accepted Answer

a. Invisible friction ridge impressions
b. Friction ridge impressions of unknown origin

Question 2

How are latent prints recovered from items of evidence or from surfaces at a crime scene?

Accepted Answer

Using powders and chemical reagents

Question 3

patent prints are those left in a soft material such as clay, glue, wax, soap or tacky paint.

Accepted Answer

Patent prints are visible prints left on a smooth surface when blood, ink, paint, grease, or some other liquid comes in contact with the hands and is then transferred to that surface. The description given refers to plastic prints, which are indentations left in soft materials.

Question 4

Give two examples of patent prints.

Accepted Answer

The answer of Give two examples of patent prints....

Question 5

What is the job of a latent print examiner?

Accepted Answer

The answer of What is the job of a latent...

Question 6

How are latent fingerprints left on a surface?

Accepted Answer

The answer of How are latent fingerprints left on a...

Question 7

What are the three types of sweat glands in the human body, and where they found?

Accepted Answer

The answer of What are the three types of sweat...

Question 8

Eccrine sweat is 90% water.

Accepted Answer

The answer of Eccrine sweat is 90% water....

Question 9

Name ten components of eccrine sweat other than water.

Accepted Answer

The answer of Name ten components of eccrine sweat other...

Question 10

Most fingerprint reagents react with which components of eccrine sweat?

Accepted Answer

The answer of Most fingerprint reagents react with which components...

Question 11

What is the definition of a porous substrate? What is the definition of a nonporous substrate? Give two examples of each.

Accepted Answer

The answer of What is the definition of a porous...

Question 12

Are rough or highly textured surfaces conducive to latent fingerprint development? Why, or why not?

Accepted Answer

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Question 13

Why are fingerprints on nonporous substrates fragile?

Accepted Answer

The answer of Why are fingerprints on nonporous substrates fragile?...

Question 14

it is possible to determine the age of a latent fingerprint.

Accepted Answer

It is not possible to determine the age of a latent fingerprint as there are various factors that can affect the persistence of the print, such as the surface it was left on and environmental conditions.

Question 15

What are the factors that contribute to how long a latent print will persist on a surface?

Accepted Answer

The answer of What are the factors that contribute to...

Question 16

Name three features of a substrate that may have an impact on the persistence of latent prints.

Accepted Answer

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Question 17

Is it possible to obtain DNA evidence from items that have been touched? Why, or why not?

Accepted Answer

The answer of Is it possible to obtain DNA evidence...

Question 18

In what circumstances is it appropriate to sample touch DNA from a surface?

Accepted Answer

The answer of In what circumstances is it appropriate to...

Question 19

How is contamination avoided when collecting touch DNA samples?

Accepted Answer

The answer of How is contamination avoided when collecting touch...

Question 20

the majority of laboratories analyze touch DNA.

Accepted Answer

Touch DNA analysis is a specialized process and not all laboratories have the capability or resources to perform it.

Quiz 6: The Nature of Latent Prints