In linguistics genetic relationship is the usual term for the relationship which exists between language that are members of the same language family. The term genealogical relationship is sometimes used to avoid confusion with the unrelated use of the term in biological genetics. Languages that possess genetic ties with one another belong to the same linguistic grouping, known as a language family. These ties are established through use of the comparitive method of linguistic analysis. Two languages are considered to be genetically related if one is descended from the other or if both are descended from a common ancestor.
Gene variants underlie individual language skills. Genetic predisposition might favour the evolution of structural features of languages. Humans have unique natural ability to develop highly complex linguistic systems that is an ability that lies in our genes but is also shaped by our different environments. We can learn languages from others and use them to share our thoughts, feelings and desires. Languages are the foundation of society culture and science. So it is perhaps not surprising that all aspects of language including structure, global distribution, acquisition, processing in the brain, role in thought and actions and links with culture and education can be considered to be important subjects of research. The past few years, however have seen the rapid development of methods to analyze genes quickly and relatively cheaply. At last we began to study the genetic basis of human cognition and hence language.