Genome Sizes Of Humans And Other Organsims

Comparative genome sizes of humans and other organisms

Organism	estimated size	estimated gene number	average gene density	chromosome number
Homo sapiens (human)	2900 million bases	~30,000	1 gene per 100,000 bases	46
Rattus norvegicus (rat)	2,750 million bases	~30,000	1 gene per 100,000 bases	42
Mus musculus (mouse)	2500 million bases	~30,000	1 gene per 100,000 bases	40
Drosophila melanogaster (fruit fly)	180 million bases	13,600	1 gene per 9,000 bases	8
Arabidopsis thaliana (plant)	125 million bases	25,500	1 gene per 4000 bases	10
Caenorhabditis elegans (roundworm)	97 million bases	19,100	1 gene per 5000 bases	12
Saccharomyces cerevisiae (yeast)	12 million bases	6300	1 gene per 2000 bases	32
Escherichia coli (bacteria)	4.7 million bases	3200	1 gene per 1400 bases	1
H. influenzae (bacteria)	1.8 million bases	1700	1 gene per 1000 bases	1

Genome size does not correlate with evolutionary status, nor is the number of genes proportionate with genome size.


Posted By:
Mitesh Jain.