A breed is a group of animals with the same characteristics like colour, behaviour, body shape, etc., that differ from those of other groups of animals. Mating of animals within the same breed but having no common ancestors till 4-6 generations on both sides is called outcrossing. It is practised in cattle to get the desired quality and productivity of milk. It also enhances growth in beef cattle and also checks the problem of inbreeding depression.
Inbreeding refers to the mating of organisms closely related by ancestry. Crossbreed is an organism with purebred parents of two different breeds. Interspecific hybridization is a process where hybrids are bred by the mating of individuals from two species.