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Evolutionary Significance of Inbreeding and Outbreeding
The inbreedings and outbreedings, both, provide raw material to natural selection. Inbreeding allows natural selection to operate on recessive genes, but does not permit the introduction of good mutations from outside. While, outbreeding provides an opportunity for the accumulation of good traits of different races in one individual or line. It expresses good qualities of the races and masked the deleterious recessive alleles. Thus, it can be concluded at last that inbreeding and outbreeding, both, provide new allelic combinations which may be good or bad for the natural selection.