Answer: The V, D and J gene are rearranged in an order during B-cell differentiation. Firstly, D to JH joining takes place followed by V to DJH joining. Recombinant signal sequence mediate such rearrangements. The inactivation of DH1 JH1 rearrangement is found mainly in patients with multiple myeloma. Also, detection of minimal residual diseases is seen in such cases. The VH1 inactivation leads to affect purines compared to pyrimidines leading to mutation and interference of nucleic acid synthesis. T cell receptor V beta gene families are used by lymphocytes which affect the hyperglycemic condition and beta cell destruction. The inactivation of Vbeta3 may lead to control of diabetes. The Dbeta3 deactivation is found in patients with leukemia. This deactivations may lead to an immunodeficient phenotype. RAG2 function inactivation leads to inability of rearrangement of V, D ad H gene. This inactivation also leads to impaired development of lymphocytes with reduced chromosomal V(D)J recombination. Solution Answer: The V, D and J gene are rearranged in an order during B-cell differentiation. Firstly, D to JH joining takes place followed by V to DJH joining. Recombinant signal sequence mediate such rearrangements. The inactivation of DH1 JH1 rearrangement is found mainly in patients with multiple myeloma. Also, detection of minimal residual diseases is seen in such cases. The VH1 inactivation leads to affect purines compared to pyrimidines leading to mutation and interference of nucleic acid synthesis. T cell receptor V beta gene families are used by lymphocytes which affect the hyperglycemic condition and beta cell destruction. The inactivation of Vbeta3 may lead to control of diabetes. The Dbeta3 deactivation is found in patients with leukemia. This deactivations may lead to an immunodeficient phenotype. RAG2 function inactivation leads to inability of rearrangement of V, D ad H gene. This inactivation also leads to impaired development of lymphocytes with reduced chromosomal V(D)J recombination..