Maternal-fetal interactions and MHC polymorphism.

Abstract excerpt

Two models of maternal-fetal interactions are discussed. In the first, offspring are advantaged if they possess an allele absent in their mother. Polymorphism is maintained because rare alleles have an advantage when present in males. In the second, offspring are disadvantaged if they lack an allele present in their mother. Polymorphism is maintained because rare alleles have an advantage when present in females....

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