The heterozygotes are made homozygotes through:

Options

A. Continuous out breeding
B. Continuous inbreeding
C. continuous mutations
D. Random mutations

Answer

To answer the question "The heterozygotes are made homozygotes through:", we need to understand the concepts of heterozygous and homozygous organisms, as well as the breeding methods that can lead to the formation of homozygotes from heterozygotes.

### Step-by-Step Solution:

1. **Define Heterozygous and Homozygous:**
- **Homozygous:** An organism is homozygous when it has two identical alleles for a particular gene. For example, it can be either AA (homozygous dominant) or aa (homozygous recessive).
- **Heterozygous:** An organism is heterozygous when it has two different alleles for a particular gene, such as Aa.

2. **Understand the Process of Making Homozygotes from Heterozygotes:**
- To convert heterozygotes (Aa) into homozygotes (AA or aa), a breeding method is required that promotes the pairing of similar alleles.

3. **Identify the Breeding Method:**
- The method that is primarily used to make heterozygotes homozygous is **continuous inbreeding**. This involves mating individuals that are closely related, which increases the chances of offspring inheriting the same alleles from both parents.

4. **Explain Continuous Inbreeding:**
- In continuous inbreeding, individuals with similar traits are repeatedly crossed. This leads to a higher probability of producing homozygous offspring over generations. For example, if two heterozygous individuals (Aa) are crossed, the offspring can be AA, Aa, or aa, with a certain ratio of homozygous to heterozygous individuals.

5. **Conclusion:**
- Therefore, the correct answer to the question is that heterozygotes are made homozygotes through **continuous inbreeding**.

### Final Answer:
Heterozygotes are made homozygotes through **continuous inbreeding**.