<prompt> Nude mouse is used in genetics because of the following properties -a Absence of thymusb Xenograft can be sustained for weeksc Severe combined immunodeficiency mice is same as nude miced they can generate mature T lymphocytesacabadbc  <response>: The genetic basis of nude mouse mutation is a disruption of the FOXN1 gene.Characteristics of nude mouse mutation are:-AR mutation of a nu locus on chromosome 11Thymic aplasiaT-cell deficientNormal B-cell function.Phenotypically hairless.Accepts xenograft and allograft transplantationInsusceptible to graft-versus-host diseaseNo generation of cytotoxic effector cellsSCID mutation occurs on chromosome 16. SCID mouse has a thymus, lymph nodes and splenic follicles virtually devoid of lymphocytes. 