how victim died and why
manner of death (4)
accidental, suicide, homicide, or natural
algor mortis definition
tempature loss after death
rate of algor mortis
1.4 degress an hour and cools till its room temp
"death color" comes from the color of the blood pooling. depends on body position but blood always pools down (ie if lying on back color is lost from front and goes to back)
after 2 days of body being dead...
the skin marbles and the face is discolored
after 4 days of body being dead...
skin blisters and swells because of CO2 (carbon dioxide)
after 6-10 days of body being dead...
blood fluid leaves the eye
what is the body farm?
a place where people/students observe different decomposition of bodies in different scenarios
what is trace evidence
small amount of evidence
what is secondary transfer
evidence transfered from one place to another
where does dna come from in hair and what kind of evidence is it?
hair is class evidence unless it has dna on it.
dna comes from follicle
what is the order of the layers of hair? and how do human and animal hair differ?
cuticle then cortex and medulla in the middle
human hair is imbricate
animal hair has a thicker medulla
what are the 3 structures of fingerprints and which is more/least common
whoral, loop, arch
loop = most common
arch = least common
when are fingerprints formed and what is a delta?
fingerprints formed before birth. a delta is a triangle shape off of a loop on a fingerprint
where does dna come from?
hair, blood, saliva, cells, and seman
what do restriciton enzymes do?
cute dna at a specific point
what are the four bases of dna and do small or large amounts travel farther in gel electrophoresis?
4 Bases: C,T,G, and A
shorter travels farther
list natural fibers
cotton, wool, silk, fur, and plant fibers are natural
list synthetic fibers
polyester, rayon, and nylon
what is warp and weft?
warp is up and down
wft is left and right
list 3 types of weave patterns
plain, twill, and satin (make sure u know them)
4 types of blood and what each of their antigens are
A: a antigens
B: b antigens
AB: a and b antigens
O: no antigens
what is an antigen?
a protein on a red blood cell
how are boys and girls different?
boys have thinner pelvis and thicker brow bone