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