Chromosome 20 (human)

Chromosome 20 (human)
Pair of human chromosome 20 (after G-banding). One is from mother, one is from father.
Chromosome 20 pair in human male karyogram.
Features
Length (bp)	63,025,520 bp
Number of genes	897 1,068
Type	Autosome
Centromere position	Metacentric
Identifiers
RefSeq	NC_000020
GenBank	CM000682

Chromosome 20 is one of the 23 pairs of chromosomes in humans. Chromosome 20 spans around 63 million base pairs (the building material of DNA) and represents between 2 and 2.5 percent of the total DNA in cells. Chromosome 20 was fully sequenced in 2001 and was reported to contain over 59 million base pairs representing 99.4% of the euchromatic DNA. Since then, due to sequencing improvements and fixes, the length of chromosome 20 has been updated to just over 63 million base pairs.

Identifying genes on each chromosome is an active 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 by 11%, with one estimate giving 956 genes, and the other estimate giving 1,068 genes.

The following are some of the genes located on chromosome 20:

The following diseases are some of those related to genes on chromosome 20: