Homozygous purelines in cattle can be obtained by

Options

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.

Explanation

To solve the question regarding how homozygous pure lines in cattle can be obtained, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Homozygosity**:
- Homozygosity refers to having two identical alleles for a particular gene. In cattle, this means that both alleles for a trait are the same, leading to purebred lines.

2. **Animal Breeding Types**:
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