Final forensic science

The shaft of the hair is considered class evidence

/True

Which of the following characteritics is found in typical Asian hair

/b. dark medulla

When are fingerprints formed?

10 weeks' gestation (pregnancy).

print with two or more patterns, or does not clearly fall under any of the other categories

Accidental Whorl

Used to get prints off metal, glass or skin. Produces a white print. The sample is heated in a vapor tent.

Cyanoacrylate

The studyof fingerprints is called

Dactyloscopy

The passing of evidence from victim to suspect or vice versa

Direct Transfer

print with two deltas and two loops combined in one print. Makes an "S" or hand interlocking shape

Double Loop Whorl

Fingerprint matching by a computer happens within in a matter of seconds.

False

Fingerprints of the left hand are mirror images of the fingerprints on the right hand.

False

Hair is composed mostly of a protein called cellulose.

False

It is necessary to obtain a full print from a suspect in order to compare his fingerprint with a fingerprint found at the crime scene.

False

The smallest indivisible unit of a textile, that has a length 100 times greater than its diameter

Fiber

Which of the following is NOT one of the three principles of fingerprinting

Identical twins have the same DNA and will have the same fingerprints

A hidden fingerprint was found as a crime scene and was made visible through the use of magnetic powder. What is this type of fingerprint called?

Latent Fingerprint

What is tle most common type of fingerprint pattern?

Loop

chemical that reacts with amino acids to produce a purple color

Ninhydrin

A visible fingerprint is produced at a crime scene from fingers that were coated with blood. What is this type of fingerprint called?

Patent Fingerprint

A print in which ridges enter on one side and exit on the other side

Plain Arch

5. A print with two deltas and a complete circuit. The line between the deltas intersects the circuit

Plain Whorl

A 3-D fingerprint is left in soap at a crime scene. What is this type of fingerprint called?

Plistic Fingerprint

3. print with one delta with ridges that enter and leave on the same side, towards the thumb

Radial Loop

transfer of evidence from a source to a suspect, and then another person

Secondary Transfer

Used to lift prints off wood and styrofoam, produes a black or rediish brown print DV under uv light.

Silver nitrate

2. A print in which ridges enter on one side, spike in the center, and exit on the other side

Tented Arch

The use of fingerprints in identification is not perfect because

The current technology depends on humans to analyze the information, and humans make mistakes.

What characteristics of cotton make it a great source of fiber for clothing?

The fibers are easily woven and dyed

A fingerprint is an impression left on any surface that consist of the pattern of ridges on the last joint of a person's finger. They are a result of oil and secretions from skin mixing with dirt.

True

print with one delta with ridges that enter and leave on the same side, towards the pinky

Ulnar Loop

What is the least common type of fingerprint pattern?

VC. Arch

All hairs on the head of a person are identical.

VFalse

Fingerprints are generally considered to be a form of class evidence.

VFalse

A fingerprint remains unchanged over the course of a person's lifetime.

VTrue

Hair can provide clues about someone's ancestry.

VTrue

IAFIS improves the speed and accuracy of fingerprint searches because it electronically accesses fingerprints from local, state, and national agencies.

VTrue

It is important to always photograph a fingerprint before you attempt to lift it.

VTrue

A lengthwise yarn or thread in a weave

Warp

crosswise yarn or thread in a weave

Weft

Fibers that have been spun together

Yarn

Hair can be used to determine

all of the these

Match the following subcategories to their fiber classification.

animal Natural

characteristic of natural fibers is that they

are affected by microscopic organisms

All of the following are characteristics of a synthetic fiber except They

are produced by plant, animals, and other organisms

6. A print with two deltas and a complete circuit. The line between the deltas does not intersect the circuit

c. Central Pocket Whorl

All of the following are generally true about fiber evidence except that

can be used to place a person at a crime scene at a specific time

What type of evidence are fibers considered?

class and trace evidence

Which parts of a hair can be analyzed for nudear DNA

follicle

What is way that a fiber can be collected?

forceps vacuum lint roller all of these

Animal hair can be dstingushed from human hair because animal har

greater medulary index and more varation in the cuticle pattem

Human hair has which type of cuticle

imbricate

Microscopic hair analysis

is used to exclude asuspect

brown colored print is produced that fades quickly and must be photographed immediately or sprayed with starch. Used for lifting prints on paper or cardboard

lodine

What is the different between a regenerated fiber and a synthetic fiber?

manufactured component. Synthetic fibers Regenerated fibers have a natural component to them derived from cellulose in combination with a originate from petroleum products and are non-cellulose based,

Match the following subcategories to their fiber classification.

mineral Natural

While looking at the basic fingerprint patterns can quickly help eliminate a suspect, in order to positively match a print found at a crime scene to an individual, more is needed. Every individual, including identical twins, has a unique fingerprint due to unique ridge patterns called

minutiae

Which of the following is most likely a result of the hair bleaching?

oidized hair and damaged DNA

Match the following subcategories to their fiber classification.

plant Natural

Natural fibers can be harvested from

plants, animals, minerals

Animal fibers are made up of blank whereas plant fibers are made up of blank

protein and cellulose

Match the following subcategories to their fiber classification.

regenerated Manufactured

The type of weave pattern of a fabric affects all of the following except

solubility in water

Which of the following is not a place that fibers can originate from?

steel

Which factors are used to calculate the medullary cortex of the hair?

width of medulla and the width of the hair

Although variations can occur, which of the following best describes European hair?

straight or wavy with evenly distributed granules

Match the following subcategories to their fiber classification.

synthetic Manufactured

The period when hair is naturally shed is called the

telogen