Chromosome 11 is one of the 23 pairs of chromosomes in humans. Humans normally have two copies of this chromosome, Chromosome 11 spans about 135 million base pairs and represents between 4 and 4.5 percent of the total DNA in cells. Identifying genes on each chromosome is an area of genetic research. Because researchers use different approaches to genome annotation their predictions of the number of genes on each chromosome varies, in January 2017, two estimates differed insignificantly, with one estimate giving 2,920 genes, and the other estimate giving 2,893 genes. At 21.5 genes per megabase, Chromosome 11 is one of the most gene-rich, more than 40% of the 856 olfactory receptor genes in the human genome are located in 28 single-gene, and multi-gene, clusters along this chromosome
Human chromosome 11 pair after G-banding. One is from mother, one is from father.
G-banding ideogram of human chromosome 11 in resolution 850 bphs. Band length in this diagram is proportional to base-pair length. This type of ideogram is generally used in genome browsers (e.g. Ensembl, UCSC Genome Browser).