There are accumulating evidence that different MHC-genotypes induces resistance or susceptibility of several diseases in both mammals and birds. The general hallmark of MHC is its high polymorphism. It seems that the inability of particular MHC alleles to bind peptides from all possible proteins are covered both by variation at the level of the genes and by overdominance. Males that are particularly polymorphic at their MHC, or have different MHC-genotypes, express more exaggerated sexual ornaments . Offspring survival correlates with their MHC-genotype.
Gene flows within and between small populations.
Due to the problems related to the release of transgenic plants and animals into nature there is a considerable need for research concerning gene flows between and within natural or semi-natural populations. This line of research aims at studying transition of genes, gene flows and expression of genes in small and isolated populations of animals. The Role of Parasites in Life History Evolution. Genetic variation in MHC and its importance for fitness in the great reed warbler.