Difference between inbreeding and out-breeding in cattle. State one advantage and one disadvantage for each one of them.

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Solution

Inbreeding Outbreeding
Mating of more closely related individuals. Mating of unrelated animals.
Mating is between animals of the same breed for 4-6 generations. If mating is between animals of same breed then there should be no common ancestors for 4-6 generations.
Advantage is that it increases homozygosity and so is used for developing pure lines. Advantage is that it produces hybrids with desirable characters like better lactation period and high milk productions.
Disadvantage is that it causes inbreeding depression because of which there is decline in survival and reproduction. It causes outbreeding depression because of which there is decline in reproductive fitness.
Mating is between same species. Mating is between different species.

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