Immune System
Major Histo Compatibility Complex (MHC) is a collection of genes arrayed on

chromosome 6 in man, chromosone 21 in mice
chromosome 17in man, chromosome 6 in mice
chromosome 21 in man, chromosome 6 in mice
chromosome 6 in man, chromosome 17 in mice

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Immune System
Polymorphonuclear leukocytes (or PMNs)

are a type of phagocyte that can engulf and kill bacteria
are derived from bone marrow stem cells
can be attracted to the site of an infection following activation of complement
All of these

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