Summary

Bacteria are haploid. A bacterial genome consists of a single, circular chromosome. A bacterial genome has relatively high gene density, consisting mostly of protein coding sequence. Eukaryotic genomes are linear and usually made up of multiple chromosomes. The vast majority of a eukaryotic genome is not protein coding sequence. Much of the noncoding sequence is repetitive DNA, including LINEs and SINEs. A karyotype is a written description of an individual’s chromosomes, while a karyogram is a visual representation of the karyotype.