54.5 MB (4.9 MB compressed)
4836 x 3936 pixels
40.9 x 33.3 cm ⏐ 16.1 x 13.1 in (300dpi)
PETER MENZEL / SCIENCE PHOTO LIBRARY PETER MENZEL / SCIENCE PHOTO LIBRARY
DNA sequencing of the human genome: computer display of an automated method of decoding the sequence of base-pairs in fragments of DNA extracted from human chromosomes. Mapping & sequencing are two phases of the human genome project, an ambitious plan to reveal all of the information encoded in the 23 pairs of human chromosomes. Mapping refers to a physical survey of each chromosome to determine the exact location of genes or other genetic markers. Sequencing of all the DNA in the human genome would involve manipulating 3 billion base-pairs. Photographed in Leroy Hood's laboratory at CalTech, USA.
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