Because gorillas are our closest ancestor their genetic makeup is similar enough to use in research, for the replacement of humans. Gorillas and other primates are used in medical research in the place of humans hence close genetic makeup. One example of primates used in replacement of humans during research work is in the ZFY experiment by Dorit. To calculate rates of mutation in the zinc fingery gene Dorit and his team compared DNA sequences. Realizing more research needs to be completed in order to link certain species, it is feasible that the close similitude between gorilla DNA and human DNA is a cause for their close characteristic social behaviors.
Primates are our closest relative in the primate family.
For example they have functional hands, functional thumbs, an intelligence level, and they have the ability to learn, not only through imitation but through trial and error. Primates are the most well developed mammals. Primates can stand up for long periods of time. In an article written by Byrne, he shows how mountain gorillas have learned complex techniques. He states how gorilla's stomachs are similar to humans in that they are not capable of neutralizing poisons from plants.