Homozygous pure lines in cattle can be obtained by
(a) mating of unrelated individuals of same breed
(b) mating of individuals of different breed
(c) mating of individuals of different species
(d) mating of related individuals of same breed.
(a) mating of unrelated individuals of same breed
(b) mating of individuals of different breed
(c) mating of individuals of different species
(d) mating of related individuals of same breed.