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English: Comparison of size of adult chimpanzee (Pan troglodytes) and adult human. This image assumes a height of 1.75 m for the human and 1.2 m for the chimpanzee.
A draft version of the chimpanzee genome was published in 2005 and encodes 18,759 proteins, [30] [31] (compared to 20,383 in the human proteome). [32] The DNA sequences of humans and chimpanzees are very similar and the difference in protein number mostly arises from incomplete sequences in the chimpanzee genome.
A chimpanzee's testicles are unusually large for its body size, with a combined weight of about 4 oz (110 g) compared to a gorilla's 1 oz (28 g) or a human's 1.5 ounces (43 g). This relatively great size is generally attributed to sperm competition due to the polygynandrous nature of chimpanzee mating behaviour .
This is a list of large extant primate species (excluding humans) that can be ordered by average weight or height range. There is no fixed definition of a large primate, it is typically assessed empirically. [1]
Formerly the bonobo was known as the "pygmy chimpanzee", despite the bonobo having a similar body size to the common chimpanzee. The name "pygmy" was given by the German zoologist Ernst Schwarz in 1929, who classified the species on the basis of a previously mislabeled bonobo cranium, noting its diminutive size compared to chimpanzee skulls.
From left: Comparison of size of gibbon, human, chimpanzee, gorilla and orangutan. Non-human hominoids do not stand upright as their normal posture. The families, and extant genera and species of hominoids are: Superfamily Hominoidea [25] Family Hominidae: hominids ("great apes") Genus Pongo: orangutans Bornean orangutan, P. pygmaeus
Order: Primates Linnaeus, 1758 [1] ... (relative to body size) compared to other mammals, ... Like humans, chimpanzees can distinguish the faces of familiar and ...
Brain size usually increases with body size in animals (i.e. large animals usually have larger brains than smaller animals); [4] the relationship is not, however, linear. Small mammals such as mice may have a brain/body ratio similar to humans, while elephants have a comparatively lower brain/body ratio. [4] [5]