Chimpanzees, gorillas and orangutans are always said to be human’s closest relatives. There is a very high possibility that human are the later generation of them. From the existing literature, it is known that chimpanzees share 99% of human’s DNA while gorillas and orangutans share 98% and 97% of human’s DNA respectively (Ghosh, 2012). Moreover, by comparing their genomes, results indicate that the human family divided from orangutans 14 million years ago, gorillas 10 million years ago, and chimps 6 millions years ago. Ghosh (2012) also points out that the most surprising thing is the dates are earlier than many scientists had expected while not the order of events. Recently, a group of scientists did a test which compared the genome of the western lowland gorilla and about 11000 of its key genes with humans, Homo sapiens and chimpanzees. The finding is that both before gorillas separated from the other apes and before gorillas themselves divided into two main groups, a comfortable amount of gene flow or inter-bleeding existed between slightly different genetic strains (ABC Science, 2012).
The study shows that humans are more similar to gorillas than previously thought
The first full genome analysis has revealed that 15% of gorillas' genetic makeup is closer between humans and gorillas than it is between humans and chimpanzees. Photograph: Luanne Cadd