concept

Separation of DNA fragments by electrophoresis through an agarose gel.

Shadow of a DNA double helix on sequencing output

Human eye with blue iris

Microbead 'lasers' engulfed by cells, artistic impression

DNA double helix and sequencing output

The first DNA fingerprint. The first three lanes contain DNA from a woman, her mother and her father respectively. Lanes 4 - 11 contain DNA from assorted other species including mouse, baboon, lemur, cow, grey seal and tobacco (last lane). The DNA probe used in this experiment detected tandomly repeated short stretches of DNA called minisatellites whose length varies between individuals.

Focus on genetics

An early DNA fingerprint showing DNA patterns from a mother (lanes 2 and 8) and her four children (adjacent lanes to the right). Lane 1 is an unrelated person. The two sets of lanes show the fingerprints reveled with two different probes that detect different types of repeated sequences.

Separation of DNA fragments by electrophoresis through an agarose gel. An electric current is passed through the gel and separates the DNA fragments according to size. The mixture of fragments is applied to a well at the top of the gel before the current is started. The smaller fragments travel further and reach the bottom of the gel while the larger ones remain towards the origin.

Shadow of a DNA double helix on a background that shows the fluorescent banding of the sequencing output from an automated DNA sequencing machine.

Text on "Dermatographs" and "Variety of Patterns" for finger print identification.

Henry Faulds, "Dermatographs" and "Variety of Patterns"

Photomacrograph of a close-up view of the pupil and iris in a human eye. The human eye is a complex organ and works in a similar way to a camera. Light enters the eye through the pupil (black). The size of the pupil is controlled by the iris (blue) in order to adjust how much light enters the eye at any given time. Here, the iris is coloured blue, but other colours such as brown, hazel, green and grey can be present instead. Light enters the eye and is focused onto the retina at the back of the eye, which then converts these images into electrical signals and sends them on to the brain to interpret and make sense of. The white part of the eye (sclera) and upper eyelashes are also visible. Width of image is 3 cm.

Bibliothèque photographique

Medical Heritage Library

115 pages, 8 plates : illustrations ; 19 cm.

La photographie judiciaire : avec un appendice sur la classification et l'identification anthropométriques / par Alphonse Bertillon.

Photomacrograph of a human eye. The human eye is a complex organ and works in a similar way to a camera. Light enters the eye through the pupil (black). The size of the pupil is controlled by the iris (hazel) in order to adjust how much light enters the eye at any given time. Here, the iris is coloured hazel, but other colours such as brown, green, blue and grey can be present instead. Light enters the eye and is focused onto the retina at the back of the eye, which then converts these images into electrical signals and sends them on to the brain to interpret and make sense of. The sclera (white part of the eye) and eyelashes are also visible here. Width of image is 5 cm.

Human eye

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Identification

Images

Catalogue

Shadow of a DNA double helix on sequencing output

Henry Faulds, "Dermatographs" and "Variety of Patterns"

Human eye with blue iris

La photographie judiciaire : avec un appendice sur la classification et l'identification anthropométriques / par Alphonse Bertillon.

Human eye

Wellcome uses cookies.

Identification

Images

Catalogue

Shadow of a DNA double helix on sequencing output

Henry Faulds, "Dermatographs" and "Variety of Patterns"

Human eye with blue iris

La photographie judiciaire : avec un appendice sur la classification et l'identification anthropométriques / par Alphonse Bertillon.

Human eye

Wellcome Collection

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