Properties of Inter-se Mating
Which of the following is true about inter-se mating-
- It is a type of 2-way cross/2-breed cross
- It is the mating of crossbred progeny among themselves ($F_{1} \times F_{1}$)
- It maintain the same level of inheritance
- All the above — Correct Answer
Explanation:
Correct Answer: All the above
All three statements about Inter-se mating are correct:
- It is a type of 2-way cross / 2-breed cross.
- It is the mating of crossbred progeny among themselves (F₁ × F₁).
- It maintains the same level of inheritance from both parent breeds in subsequent generations.
Inter-se Mating vs Other Crosses
| Cross Type | Definition | Heterosis level |
|---|---|---|
| F₁ cross (2-way) | Breed A × Breed B → F₁ | Maximum (100%) |
| Inter-se mating | F₁ × F₁ (crossbreds mated together) | Reduced by 50% in F₂ |
| 3-way cross | F₁ × Breed C | High |
| 4-way cross | F₁ × F₁ (from different parents) | High |
Key Note
- Heterosis in F₂ is diminished due to inter-se mating — heterozygosity reduces by 50% each generation.
- Maximum hybrid vigour is always in F₁ generation.
📚 About this Topic — Animal Genetics & Breeding
This multiple choice question is from Animal Genetics & Breeding, Animal Refresher. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Genetics & Breeding to strengthen your preparation.
