2. The MHC genes are highly polymorphic. This means there are multiple variants alleles of each gene in the population. The polymorphism is so high that in a mixed population there are no two individuals with exactly the same set of MHC genes and molecules, with the exception of identical twins.
t uː WORD_BOUNDARY ð ɪ WORD_BOUNDARY ɛ m eɪ t̠ʃ s iː WORD_BOUNDARY d̠ʒ iː n z WORD_BOUNDARY ɑ ɹ WORD_BOUNDARY h aɪ l i WORD_BOUNDARY p ɑ l ɪ m ɔ ɹ f ɪ k WORD_BOUNDARY ð ɪ s WORD_BOUNDARY m iː n z WORD_BOUNDARY ð ɛ ɹ ɑ ɹ WORD_BOUNDARY m ʌ l t ɪ p ə l WORD_BOUNDARY v ɛ ɹ iə n t s WORD_BOUNDARY ʌ l iː l z WORD_BOUNDARY ʌ v WORD_BOUNDARY iː t̠ʃ WORD_BOUNDARY d̠ʒ iː n WORD_BOUNDARY ɪ n ð ə WORD_BOUNDARY p ɑ p j ʊ l eɪ ʃ ə n WORD_BOUNDARY ð ə WORD_BOUNDARY p ɑ l ɪ m ɔ ɹ f ɪ z ə m WORD_BOUNDARY ɪ z WORD_BOUNDARY s oʊ WORD_BOUNDARY h aɪ WORD_BOUNDARY ð æ t WORD_BOUNDARY ɪ n WORD_BOUNDARY ʌ WORD_BOUNDARY m ɪ k s t WORD_BOUNDARY p ɑ p j ʊ l eɪ ʃ ə n WORD_BOUNDARY ð ɛ ɹ ɑ ɹ WORD_BOUNDARY n oʊ WORD_BOUNDARY t uː WORD_BOUNDARY ɪ n d ɪ v ɪ d̠ʒ uː ə l z WORD_BOUNDARY w ɪ ð WORD_BOUNDARY ɛ ɡ z æ k t l i WORD_BOUNDARY ð ə WORD_BOUNDARY s eɪ m WORD_BOUNDARY s ɛ t WORD_BOUNDARY ʌ v WORD_BOUNDARY ɛ m eɪ t̠ʃ s iː WORD_BOUNDARY d̠ʒ iː n z WORD_BOUNDARY æ n d WORD_BOUNDARY m ɑ l ɪ k j uː l z WORD_BOUNDARY w ɪ ð ð ɪ WORD_BOUNDARY ɛ k s ɛ p ʃ ə n WORD_BOUNDARY ʌ v WORD_BOUNDARY aɪ d ɛ n t ɪ k ə l WORD_BOUNDARY t w ɪ n z WORD_BOUNDARY