Inbreeding : Mating of closely related animals within the same breed :: Out-crossing :
A
Mating of animals belonging to different breeds
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B
Mating of animals belonging to two different unrelated species
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C
Mating of animals belonging to two different related species
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D
Mating of unrelated animals within the same breed
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Solution
The correct option is D Mating of unrelated animals within the same breed Selective mating of animals to produce offspring with desired qualities is called animal breeding.
It is of two types: inbreeding and out-breeding.
Inbreeding: Mating of more closely related individuals (having common ancestors) within the same breed.
Out-breeding involves mating of unrelated animals. It is of three types
Out-crossing: Mating of unrelated animals within the same breed that do not have common ancestors.
Cross-breeding: The superior males of one breed are mated with superior females of another breed.
Interspecific hybridisation: Mating of male and female animals of two different but closely related species.
Therefore, inbreeding : Mating of closely related animals within the same breed :: Out-crossing : Mating of unrelated animals within the same breed.