Chapter #1 & #2
Qual= Interpretation based, descriptive - (quality).
Quant= Numbers based, countable, measurable - (quantity).
What is DNA made of?
Our genetic information, proteins, carbohydrates, lipids, etc.
A type of fiberous protein that makes up the majority of the cortex of the hair.
O+, O-, A+, and AB- are examples of what?
Blood types.
What's a Primary Crime Scene?
The location where the crime took place.
What is Locard's Principle of Exchange?
When two people or object collide/touch, they transfer.
What's bigger: DNA or Chromosome?
Chromosomes, because they are made of/contain DNA.
What are the contents of one piece of hair?
Cuticle (outer layer), cortex (middle layer), and medulla (core).
What's the difference between blood plasma and platelets?
Plasma: Carries nutrients, waste, proteins, etc.
Platelets: Immune cells, clotting.
Small but measurable amounts of physical or biological material found at a crime scene (Ex: hair, skin cells, clothing fibers, pollen, clothes debris, makeup, glass fragments, etc).
What is the name of the famous forensic scientist?
Locard
What's DNA's cousin called?
RNA (ribonucleic acid)
What does melanin do?
It provides us the color that our hair turns out to be (and the color of our skin but it also works for hair).
What are white cells?
Basically the same as/another name for platelets, since they also clot & immune cells.
What are your 5 senses?
Sight, hearing, taste, smell, touch.
Direct: Eyewitnesses, video cameras, confessions, testimonies, first hand observations, police dashboard, etc.
Indirect: Only info from suspect & victim, evidence found at crime scene links to suspect & victim, circumstantial, etc.
What are the four nitrogenous bases of DNA?
Adenine (A), thymine (T), cytosine (C), and guanine (G).
What are the different medulla patterns?
Continuous, interrupted/intermittent, fragmented/segmented, solid, and none.
What's the difference between antigens and antibodies?
Antigens: Substances that trigger an immune response.
Antibodies: Y-shaped structures that attach to antigens & destroy 'foreign' invaders.
What is the chain of custody?
The documented and unbroken transfer of evidence.
Pattern(s) of crime scene searching.
Spiral, grid, quadrant, linear.
What are the 3 differences between RNA and DNA?
1) RNA is a single stranded molecule (no double helix).
2) RNA sugar is ribose, which is 1 more oxygen atom than deoxyribonucleic.
3) RNA has no thymine, so its 4th base is uracil.
At what part of the hair is the DNA located?
The follicle.
What's the difference between perception and observation?
Perception: Limited since it's basically everything going on around you, whether you notice/remember it or not.
Observation: Similar to perception, but you pay closer attention and gathering thoughts on it.
What is Crime-Scene Reconstruction?
A hypothesis of the sequence of events from before the crime was committed through its commission.