MGA2 02-18

Gene Organization in prokaryotes and a range of eukaryotes

    Prokaryotic bacteria lack introns. Eukaryotic yeast have an exon / intron structure, with the majority of the genome in exons. The human genome has about ten times the DNA content as that of Drosophila. However, humans do not have a substantially larger number of coding genes than Drosophila: humans genes are more spread out over more chromosomes, and typically have a higher proportion of introns.

Figure ©2002 by Griffiths et al.; All text material ©2014 by Steven M. Carr