Homozygous purelines in cattle can be obtained by:
- AMating of unrelated individuals of same breed
- BMating of individuals of different breed
- CMating of individuals of different species
- DMating of related individuals of same breed
Solution & Step-by-step Explanation
Inbreeding involves mating closely related individuals within the same breed for 4–6 generations, which increases homozygosity and helps in evolving purelines.