Describe Tonegawa and Hozumi experiment.

The experiment conducted by Susumu Tonegawa and his colleague Hozumi in the 1970s was a groundbreaking study in the field of immunology. Their work revolutionized the understanding of the immune system, particularly how antibodies are generated and how genetic diversity is achieved to respond to a wide range of pathogens.

The core question they sought to address was how a limited number of genes could produce the vast diversity of antibodies required to fight off a multitude of different pathogens. It was understood that the immune system produces antibodies to identify and neutralize foreign invaders. However, the problem was how the immune system could produce such a ________ ________ _________ ______ _____ ______ ____ ____ ________.
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