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Eduncle Best Answer
Primary response always shows higher production of IgM whereas IgG expression occurs in secondary response, which is due to class switching mechanism. In the given graphs of IgM and IgG production, AID containing mouse should be able to perform class switching and as a result in secondary response will produce more amount of IgG compared to IgM. In case of AID deficient mouse there should not be any class switching as a result secondary response will not produce IgG. But it can still produce IgM in both primary and secondary response.