Homozygous purelines in cattle can be obtained by

Options

A. mating of related individuals of same breed
B. mating of unrelated individuala of same breed
C. mating of individuals of different breed
D. mating of individuals of different species

Answer

A

Explanation

when closely related species of same organism are corssed contiuously for few successive generations it results in accumulation of recessive characters thus homozygous purelines are obtained