Fingerprint
Appears dark on a fingerprint image
Ridge
middle layer of skin
basal
The least common fingerprint pattern.
Arch
AFIS contains approximately how many fingerprint records?
50 million
Which chemical can be used on wood or Styrofoam and turns a print black or brown-red?
Silver Nitrate
Appears light on a fingerprint image
Valley
outer most layer of skin
epidermis
Fingerprints begin forming how many weeks into a female’s pregnancy?
10 weeks
When a fingerprint expert takes the witness stand and says he’s absolutely certain two fingerprints match, he means he’s found
at least 12 or more matching minutiae
Present in 30% of the population.
whorl
Impression fingerprints
Plastic
Sweat glands located in hair follicles
apocrine
Ninhydrin and Superglue can be used to lift invisible prints because they react with what part of the print?
Amino acids found in sweat
The study of fingerprints for identification purposes is known as
dactylography or dactyloscopy.
Have ridges that enter from either the right or the left and exit from the same side they enter.
loop
Innermost layer of skin
Sweat glands located on hands and feet
eccrine
Which chemical produces a brown print that should be photographed because it fades?
iodine
Fingerprints are considered what kind of evidence? Explain.
Individual
Can be linked back to a specific person; no two people have identical fingerprints
What are the small white dots inside the ridges on a finger print called?
pores
Invisible fingerprints
The most common fingerprint pattern
loop
Whose fingerprint identification method is still used today?
Galton Henery
Explain how fingerprints are formed during fetal development.
the basal layer cells grow faster than the layers above and below it so it collapses and folds to form intricate shapes that make up the fingerprint
What are the two bones in the arm that affect fingerprints? What side are the located at
ulna (pinky) and radius (thumb)