FREE AND STUDY GAMES ABOUT UNIT 2 STUDY GUIDE

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FREE AND STUDY GAMES ABOUT UNIT 2 STUDY GUIDE

EXAM QUESTIONS

Qs and Ans Expert- Explanation

This Exam contains:

-Guarantee passing score -44 Questions and Answers -format set of multiple-choice -Expert- Explanation

Question 1: Give a few examples of natural fibers.

Answer:

Cotton, hemp, wool, silk, Linen Question 2: What is the difference between the terms microscopic and macroscopic?

Answer:

Macrosocopic level includes anything seen with the naked eye Microscopic level includes atoms & molecules

Question 3: How does Locard's Principle of Exchange relate to fiber analysis?

Answer:

With contact between two items, there will be an exchange of microscopic material Question 4: What are the 3 types of blood spatter? Give an example of each type.

Answer:

Passive stains - blood dropping from injured body.Transfer stains - blood shoe print Impact stains- getting shot by a gun

Question 5: What does DNA stand for?

Answer:

Deoxyribonucleic acid

Question 6: What is the protein that composes a strand of hair?

Answer:

Keratin Question 7: What % of nuclear DNA would you expect to share with your mother, father, grandmother (mother's side of the family), Your cousin (child of your mother's sister)

Answer:

50% for parents, 25% for grandmother,12.5% for cousin Question 8: What test is used by Forensic scientists to determine whether a dark stain is blood?

Answer:

Several presumptive tests like kastle-myer, Benzidine, Luminol, Leucomalachite Green

Question 9: What are the 4 nitrogenous bases? How do they pair?

Answer:

Adenine (A), Thymine (T), cytosine (C), guanine (G)

Question 10: Are all hairs the same? Explain.

Answer:

Hair varies from person to person, it's uncommon for two different individuals to have the same hair, but should not be an absolute personal identification

Question 11: What can a DNA profile tell a forensic scientist?

Answer:

Identify potential suspects & line suspects to a crime

Question 12: What are the 6 types of hairs that can be found on humans?

Answer:

head hair, eyebrows, eyelashes, beard, underarm air

Question 13: What happens to the diameter of a blood drop as it falls from an increasing height?

Answer:

The greater height, the larger the diameter of the bloodspots

Question 14: What are the 3 parts of the hair shaft?

Answer:

Cuticle, cortex, medulla

Question 15: Why is DNA important to forensics?

Answer:

Identify criminals with incredible accuracy when biological evidence exists, it can also clean suspects who were charged for a crime they didnt commit Question 16: What kind of test can be conducted if several fibers are found at a crime scene?

Answer:

A burn test Question 17: What % of mitochondrial DNA would you expect to share with your mother, father, grandmother (mother's side of the family), Your cousin (child of your mother's sister)

Answer:

mother, father 0%, grandma 50%,cousin 25%

Question 18: The triangular pattern of a fingerprint is called a _______.

Answer:

delta

Question 19: What is a latent fingerprint?

Answer:

Impression of the friction skinand oils of whats left of the finger pattern onto a surface

Question 20: Can fingerprints be altered or disguised? How?

Answer:

The only way to change your fingerprints is to scar or burn it

Question 21: How do fingerprint examiners determine if two fingerprints are a match?

Answer:

The examiner compares the 2 prints andlooks for similarites & differences, then decide if it's a match

Question 22: What is the top layer of skin called?

Answer:

Epidermis

Question 23: What is a fiber?

Answer:

A small thread Question 24: Which famous political leader's murder was solved due to hair analysis?

Answer:

Napoleon

Question 25: Where is DNA located?

Answer:

Nucleus and a small portion goes on mitochondria

Question 26: How might fibers be collected at a crime scene?

Answer:

Tweezers, tape, & vacuum

Question 27: Which type of fingerprint is most rare?

Answer:

Arches Question 28: How might hair be collected at a crime scene? (what is the process)

Answer:

An investigator can collect hairs they observe virtually (with tweezers or hand)&can use clear tape to lift nonvisible hair fromavariety of surfaces like clothing