Universal grammar is a topic that has been researched in linguistics since the mid-20th century. The basic, fundamental structure of all human languages is very similar, in spite of the obvious differences in vocabulary and sound. This basic structure is called Universal Grammar.

The innateness hypothesis is the idea that this Universal Grammar is present in all healthy human minds as a result of biological inheritance (in other words, grammar is innate).

the connect between innateness hypothesis and universal grammar is to speak we need innate hypothesis and this hypothesis not enough to speak well so we need something else which called universal grammar

Universal grammar refers to the innate set of linguistic principles that all human languages share, proposed by Noam Chomsky. Language universals, on the other hand, are patterns or features found across a wide range of languages that are not dependent on universal grammar. In essence, universal grammar is about the underlying structure of grammar in all languages, while language universals refer to common characteristics found in languages around the world.

Grammar is specific for a language with its specific principles in syntactic structures to formulate a grammatical principle.Universal grammar does not exist unless one formulates universal artificial language with universal syntactic principles.

The parameters of grammar are the agreement between the NP & VP along with the tense which again differs from one language to another.

eg: certain Indo- Burma languages do not have finite verb.

Masataka Miyawaki has written:

'James Harris's theory of universal grammar' -- subject(s): Comparative and general Grammar, Contributions in comparative and general grammar, Grammar, Comparative and general, History