Gene Organization in prokaryotes and a range of eukaryotes
Prokaryotic bacteria lack introns, though coding
sequence may be separated. 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 have only
about twice the number of protein-coding genes as
Drosophila. Genes in humans and other vertebrates are
more spread out over more chromosomes, and typically have a
higher proportion of introns.
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