Hair Quiz Review:

16. Describe the structure of hair. Include in your answer the term follicle, medulla, cortex, and cuticle.

A hair shaft grows on a persons scalp from the follicle root. This hair shaft includes the medulla, the middle, the cortex, and the cuticle, the outer layer.

7. Which of the following characteristic is found in typical Asian hair? A. Dark Medulla. B. Sparsely distributed pigment granules. C. Flattened cross section. D. Curls.

A. Dark Medulla.

10. Which part(s) of a hair can be analyzed for nuclear DNA? A. Follicle. B. Shaft. C. Medulla. D. All of Above.

A. Follicle. (The root)

8. Human hair has which type of cuticle? A. Imbricate. B. Spinous. C. Coronal. D. Pigmented.

A. Imbricate.

9. Microscopic hair analysis.. A. Yields individual evidence. B. Is used to exclude a suspect. C. Can prove a suspects guilt. D. Can determine maternal inheritance.

B. Is used to exclude a suspect.

14. Which of the following is likely the result of hair bleaching? A. Increased number of disulfide bonds. B. Oxidized hair and damaged DNA. C. A more triangular cross section. D. Thickened scales on the cuticle.

B. Oxidized hair and damaged DNA.

13. Although variations can occur, which of the following best describes European hair? A. Kinky with dense, unevenly distributed pigment. B. Straight or wavy with evenly distributed granules. C. Round cross section with large diameter. D. Coarse with a thick cuticle and continuous medulla.

B. Straight or wavy with evenly distributed granules.

12. The period when hair is naturally shed is called the __________. A. Catagen. B. Telogen. C. Anagen. D. Imagen.

B. Telogen.

5. Hair can be used to determine.. A. Diet. B. Drug Habit. C. Geographical History. D. All of The Above.

D. All of The Above.

11. Animal hair can be distinguished from human hair because human hair... A. Has a smaller medullary index than human hair and no cortex. B. Does not have a cuticle. C. Always has a continuous medulla pattern. D. Has a greater medullary index and more variation in the cuticle patterns.

D. Has a greater medullary index and more variation in the cuticle patterns.

6. Which factors are used to calculate the medullary index of the hair? A. Scale diameter of cuticle and length of hair. B. Width of cortex and width of the medulla. C. Length of entire hair and the pattern of pigmentation. D. Width of medulla and width of hair.

D. Width of medulla and width of hair.

3. True or False: All hairs on the head of a person are identical.

False.

2. True or False: Hair is composed mostly of a protein called cellulose.

False. It is composed of keratin.

15. Two different hairs were found at a crime scene. one hair strand only provided class evidence, whereas the other hair strand provided both class and individual evidence. Explain how this is possible?

This is possible because if the one strand can only provide class evidence, that mean there is no root DNA attached. While the other can be both it must be because it has some root DNA showing on it.

1. True or False: The shaft of the hair is considered class evidence in a trial.

True.

4. True or False: Hair can provide clues about someone's ancestry.

True.