Negative selection

• Negative selection (natural selection), the selective removal of rare alleles that are deleterious • Negative selection (artificial selection), when negative, rather than positive, traits of a species are selected for ==In immunology==

• Negative selection (immunology), in which B-cells and T-cells that recognize MHC molecules bound to peptides of self-origin, or just MHC molecules with high affinity are deleted from the repertoire of immune cells ==In politics==

• Negative selection (politics), a process that occurs in rigid hierarchies, most notably dictatorships