Question

How hereditary or genetic variation has played the significant role in the success of green and white revolution???

Answer 1

heredity is transfer of biological characters from parents to offspring via genes . by the help of genetic engineering the genetically modified crops are discovered they are known as GM crops .these crops have the ability to withstand with environmental change . so as a result green revolution happens  
 though,  these changes also takes place to develop animals so  many varieties of ruminants are made only for increasing the  milk production of India. 

Answer 2

There was a time when India was so poor that it could not feed most of its people. Failure of monsoon would often result in famine conditions. In 1967 after a drought following successive failure of monsoon, with acute short of foreign exchange India imported from USA on rupee payment wheat under Public Law 480 which came to be known as PL480. Hunger was compounded by humiliation as USA put lot of conditions on import of wheat which anyway later was found inedible for human consumption. That was the beginning of politics of hunger.