Humans normally have 46 chromosomes in each cell, divided into 23 pairs. Two copies of chromosome 5, one copy inherited from each parent, form one of the pairs. Chromosome 5 spans about 181 million DNA building blocks (base pairs) and represents almost 6 percent of the total DNA in cells.
Identifying the genes on each chromosome is an active area of genetic research. Because researchers use different approaches to predict the number of genes on each chromosome, the estimated number of genes varies. Chromosome 5 likely contains about 900 genes that provide instructions for making proteins. These proteins perform a variety of different roles in the body.
Related Genetics Topics
- Cri-du-chat syndrome — MedlinePlus Genetics
- Periventricular heterotopia — MedlinePlus Genetics
- PDGFRB-associated chronic eosinophilic leukemia — MedlinePlus Genetics
- 5q minus syndrome — MedlinePlus Genetics
- Liebenberg syndrome — MedlinePlus Genetics
- 5q31.3 microdeletion syndrome — MedlinePlus Genetics
Source: MedlinePlus Genetics, U.S. National Library of Medicine.
