Homozygous purelines in cattle can be obtained by

A mating of related individuals of same breed

B mating of unrelated individuals of same breed

C mating of individuals of different breed

D mating of individuals of different species

The answer is A.

Solution

Inbreeding produces homozygous pure lines.

Inbreeding increases homozygosity. Therefore, mating of related individuals of the same breed will increase homozygosity and give pure lines.

Concept inbreeding-homozygosity

3 questions from this chapter have appeared across 3 exam years.