How did the first sovereign legislature of India come into existence?

 It was the Indian Independence Act, 1947, that resulted in the origin and growth of the Indian legislature. The executive councils of the Governor General and the Governor in the provinces were expanded into separate sovereign legislative bodies. The act created two independent dominions known as India and Pakistan. On the midnight of 14th August, 1947, the constituent assembly was declared a fully sovereign body, and was given full legislative powers. The first sitting of the assembly was conducted on November 17th, 1947, and Dr. Rajendra Prasad presided as the chairman. The main function of the constituent assembly was to frame a constitution for independent India. The drafting committee under BR Ambedkar recommended the parliamentary type of government, which got a clear majority. On 26th January, 1950, the constitution of India came into force, and the constituent assembly became the provincial parliament of India.