chap 12 (dna) Flashcards
– it can be isolated from material that is months or even years old.
DNA is stable
DNA can be replicated in the laboratory – from a very small amount of initial material through the process of _____
PCR (POLYMERASE CHAIN REACTION).
DNA shows _______________from one individual to the next
greater variability
is functionally the hereditary material that contains the genetic information necessary for the duplication of cells and for the production of proteins.
DNA
Chemically, it is an acid, is phosphorous rich, it contains a deoxyribose sugar, it contains the four bases show the unique property of pair wise equivalency. It is a double helix composed of two complimentary strands.
DNA
is a chemical substance found in all cells whose composition have been passed on from parents to their children
DNA – de – oxy – ri – bo – nucleic acid
a. Blood and bloodstain
b. Semen and seminal stain
c. Hairs and follicles or root
d. Saliva or buccal swabs
e. Bones and organs
f. Tissues and cells
Biological Evidences that can be submitted for DNA analysis
there are reports indicating that DNA has been isolated from _________with ________
urine samples
nucleated cells
When Evidence is BLOOD and condition is LIQUID and location is PERSON
what is the Collection?
Collect in EDTA tubes
Condition is LIQUID and location in SCENE
what is their COLLECTION?
Use syringe, collect in EDTA tubes. Transfer onto cotton cloth. Air dry.
Blood, Cloth, Scene
Collect cloth in test tube. Transfer onto cotton cloth. Air dry.
Blood, Wet, Clothing
Wet, Object
Air dries at room temperature. Package in paper bag.
Collect sample with syringe. Place sample in plastic container. Freeze sample.
Wet, Water
Dried blood, Crust, (Person, scene, object)
Scrape crust into paper packet. Collect control blank.
Stain, Weapon
Collect item directly
