JW-+DNA+Questions

DNA Questions

1. True 2. False 3. True 4. False 5. True 6. True 7. False 8. False 9. True 10. True

11. C 12. C 13. A 14. C 15. D

16. When they examine the ridge patterns, since there are almost about 150 ridge characteristics on a fingerprint, they look at the unique style of the ridges. They have to analyze the ridge characteristics 17. A fingerprint is an impression left on something that has patterns made up of ridges on a finger 18. Fingerprints are formed when you are in your mother’s womb. It starts usually in about week 10. The different layers of skin start and overlap each other, which gives the form of the ridges on your finger. 19. Well, not really. You can alter them for a little bit, but eventually the skin and the patterns that you had before you tried to alter them. You can destroy the patterns for a certain period of time, but not forever. 20. A.) Ninhydrin- reacts with amino acids that are found in sweat. This is used for prints on paper B.) Cyanoacrylate- reacts with amino acids. This is used for prints on plastic, metal, glass, and on your skin. C.) Silver nitrate- this reacts to the salt from perspiration on the print. This is for wood and Styrofoam. D.) Iodine fuming- Reacts with iodine combined with carbohydrates for latent prints.