Posts Tagged ‘Human Genome’

Yes, You Can Browse the Human Genome

Wednesday, July 16th, 2008

From Wikipedia:

The Human Genome is the genome of Homo sapiens, which is stored on 23 chromosome pairs. Twenty-two of these are autosomal chromosome pairs, while the remaining pair is sex-determining. The haploid human genome occupies a total of just over 3 billion DNA base pairs and has a data size of approximately 750 Megabytes, which is slightly larger than the capacity of a standard Compact Disc.

The haploid human genome contains an estimated 20,000–25,000 protein-coding genes, far fewer than had been expected before its sequencing. In fact, only about 1.5% of the genome codes for proteins, while the rest is comprised of RNA genes, regulatory sequences, introns and (controversially) “junk” DNA.

There are 24 distinct human chromosomes: 22 autosomal chromosomes, plus the sex-determining X and Y chromosomes. Chromosomes 1–22 are numbered roughly in order of decreasing size. Somatic cells usually have 23 chromosome pairs: one copy of chromosomes 1–22 from each parent, plus an X chromosome from the mother, and either an X or Y chromosome from the father, for a total of 46.

There are several web-based genome browsers:

–>Link to UCSC.edu Human Genome Browser

–>Link to Ensembl Human Genome Browser

–>Link to National Library of Medicine Human Genome Viewer

–>Link to VEGA Human Genome Browser


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