Blood
True or False: Blood must be refrigerated as soon as possible after collected from a crime scene
True
True or false: Even identical twins have identical DNA
Falso
Define: Nucleotide
a building block of DNA or RNA, consisting of a sugar, a nitrogenous base and a phosphate group.
What is the first step to process a murder scene
Secure the area
What class of evidence are DNA and Blood
Individual
How many pints of blood do humans have
10
Procedure that separates DNA fragments according to size
Electrophoresis
What is gel electrophoresis
Electrophoresis is a technique commonly used in the lab to separate charged molecules, like DNA, according to size.
What is the chain of custody
a written record of all people who have had possession of an item of evidence
True of False: Identical twins have identical DNA
true
What is the most common blood type
O positive
What is used to separate DNA molecule in PCR process
Heating
Blood coagulation
Coagulation, also known as clotting, is the process by which blood changes from a liquid to a gel, forming a blood clot.
What was Locards theory
Every contact leaves a trace
Watson and Crick described the DNA molecule as a
Double Helix
One method to detect blood no longer visible
UV light
What are the three parts of a nucleotide
Nitrogen base, phosphate group, deoxyribose sugar
Double Helix
Two coiled DNA strands
Four ways of conducting a systematic search for evidence
-Spiral search
-Quadrant search
-Grid search
-Strip/line search
Genetic information is stored in molecules of DNA making up structures called
Chromosomes
Blood samples can be analyzed to determine what
What are two of the four nitrogen bases of DNA?
Guanine paired with Cytosine, Adenine paired with Thymine
Serology
the examination and analysis of body fluid; blood serum
Five examples of physical evidence
Blood, hair, fiber, gun, skin etc.
Molecular scissors that cut DNA at specific base sequences are called
Restriction enzymes