Disease Associated with Immune System
DiGeorge's syndrome is characterized by the lack of a thymus The mouse model closest to this human disease would be a

knock-out mouse for a thymus
knock-out mouse for RAG-1 and RAG-2
nude mouse
recombinant mouse for CD3

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Disease Associated with Immune System
Bone marrow given to an infant with SCID must

come from a donor that shares some MHC alleles with the recipient
be irradiated to eliminate GVHD
contain mature T cells that can begin making immune responses immediately
come from one of the child's parents

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