Which factor is responsible for the variation | vedclass

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(D) Inbreeding refers to the mating of more closely related individuals within the same breed for $4-6$ generations. It increases homozygosity,which h

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(D) Inbreeding refers to the mating of more closely related individuals within the same breed for $4-6$ generations. It increases homozygosity,which helps in evolving a pure line in any animal. However,continued inbreeding usually reduces fertility and even productivity. Outbreeding is the breeding of the unrelated animals,which may be between individuals of the same breed (but having no common ancestors for $4-6$ generations) or between different breeds (cross-breeding) or different species. Outbreeding is an important strategy for animal husbandry because it helps in overcoming inbreeding depression and increases genetic variation within a population. Therefore,all these methods contribute to the genetic makeup and variation within domesticated animal populations.

Which factor is responsible for the variation in genetic makeup within a specific breed of domesticated animals?

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