Crossing of unrelated pure breeds of animals with different traits within the same breed is called
Out crossing is the crossing of unrelated pure breed animals of different traits within the same breed. When animals within the same breed having no common ancestors on either side of their pedigree up to 4-6 generations are mated. The resultant offspring is known as an outcross. This helps restore fertility during inbreeding depression.
Cross breed - superior males of one breed are mated with superior females of another breed.
Inbreed - closely related animals of the same breed are allowed to mate with each other for 4-6 generations.
Interspecific hybridization - when the male and female animals of two different related species are mated.