Forensics Class Notes Part 2

Forensics Class Notes Part 2 - BIO 199H Class Notes What...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
BIO 199H Class Notes 2006-1-20 What are fingerprints? Impression of friction ridges on the skin of fingers. Friction ridges are also found on - palms - soles of the feet - solar aspect of the toes for firmer grip and resistance to slippage There are ridges and grooves - ridges are high - grooves are low (between ridges) - there are microscopic pores from which sweat is excreted Between the epidermis and the dermis is the dermal papillae - This is the basis for our fingerprints - The boundary between the epidermis and the dermis - The ridge pattern is formed in the womb The pores are the openings to the sweat ducts - connected to the sweat glands - excretes perspiration The combination of sweat and oil leaves a print when we touch things - latent fingerprints are invisible prints - perspiration and oils are transferred onto surfaces - leaves an impression of the ridges History - Ancient - Babylonian – left fingerprints on clay tablets as a signature - Chinese used them for ID - 1858 – Sir William Herschel in India demanded that laborers sign contracts with fingerprints - 1877 Herschel advised fingerprints from prisoners - 1880 fingerprints used to ID criminals - 1882 Gilbert Thompson used thumbprints on checks in US to prevent fraud - 1892 Sir Francis Galton published a book on printing – prints are unique and invariable Fingerprints are unique - Identical Twins - same DNA different prints Fingerprints are unique - formed in the fetal stage - unchanged throughout the lifetime - changes can be explained
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
- flexibility from the skin, growing, a dirty finger, scarring, a wound, or a disease of the skin Can fingerprints be changed? -
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/23/2009 for the course BIO 199H taught by Professor L during the Winter '06 term at Converse.

Page1 / 5

Forensics Class Notes Part 2 - BIO 199H Class Notes What...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online