Homozygosity can be deveveloped by

Options

A. inbreeding
B. out breeding
C. cross breeding
D. MOET

Answer

**Step-by-Step Solution:**

1. **Understanding Homozygosity:**
- Homozygosity refers to the genetic condition where an individual has two identical alleles for a particular gene. This is often associated with the development of pure lines in breeding.

2. **Inbreeding:**
- Inbreeding is the process of mating closely related individuals within the same breed. This typically occurs over several generations (4 to 6 generations).
- The purpose of inbreeding is to increase homozygosity, which helps in establishing pure lines. This is because mating closely related individuals tends to produce offspring that are genetically similar.

3. **Evaluating Other Breeding Methods:**
- **Outbreeding:** This involves mating unrelated individuals, which can lead to greater genetic diversity but does not promote homozygosity. Thus, it is not suitable for developing pure lines.
- **Crossbreeding:** This is a type of outbreeding where a superior male from one breed is mated with a superior female from another breed. This method also does not promote homozygosity and is aimed at producing hybrids with desirable traits.
- **MOET (Multiple Ovulation Embryo Transfer):** This technique involves hormonal treatment to induce multiple ovulations in a female, followed by fertilization and transfer of embryos to surrogate mothers. While it is beneficial for herd improvement, it does not directly lead to homozygosity.

4. **Conclusion:**
- The correct method for developing homozygosity is through **inbreeding**. This method ensures that the offspring have a higher chance of inheriting identical alleles, thus leading to the establishment of pure lines.

**Final Answer:**
Homozygosity can be developed by **inbreeding**.

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