Human Genome (DNA) by Numbers (statistics)

Cells in the human bodY - 75-100 trillion Base pairs in each cell -3.1 billion
Base pairs in the largest human gene (dystrophin) -2.4 million
Genes in the human genome - 28,000-35,000
Chromosomes in each cell - 46

Human DNA measurements: DNA helix diameter - 20-26 Ångström2.0-2.6 Nanometers
Distance between base pairs - 3.3-3.4 Ångström0.33-0.34 Nanometers
Length of one helix turn - 33-34 Ångströమ - 3.3-3.4 Nanometers
Number of base pairs in one helix turn - 10

How Human DNA compares to other species:
Below we listed a number of species and their DNA properties like number of chromosomes, genes and base pairs and how they differentiate in comparison to human DNA.

species CHROMOSOMES GENES BASEPAIRS
Human (Homo sapiens)
46 (23 pairs)
23,686
~3.1 billion
Mouse (Mus musculus)
40
23,786
~2.7 billion
Pufferfish (Takifugu rubripes)
44
~31,000
~365 million
Malaria Mosquito (Anopheles gambiae)
6
~14,000
~289 million
Sea Squirt (Ciona intestinalis)
28
~16,000
~160 million
Fruit Fly (Drosophila melanogaster)
8
~14,000
~137 million
Roundworm (Caenorhabditis elegans)
12
~19,000
~97 million
Bacterium (Escherichia coli)
(1)
~5,000
~4.1 million

ANIMAL
Percentage of human DNA
Chimpanzee
96.0%
Orang Utan
96.4%
Gorilla
97.7%
Bonobo
98.4%
Mice
70-98.5%