Homozygous purelines in cattle can be obtained by :
(1) mating of unrelated individuals of same breed.
(2) mating of individuals of different breed.
(3) mating of individuals of different species.
(4) mating of related individuals of same breed.

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1 Answers

The correct answer is (4)

Inbreeding increases homozygosity. So, mating of the related individuals of same breed will give homozygous purelines.

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