Three-Breed Rotational Crossing
System of mating in which 3 breeds are crossed in a rotational manner-
- Crisscross
- 3-way rotational cross — Correct Answer
- Triple crossing
- 3-way cross
Explanation:
Correct Answer: 3-way rotational cross
When 3 breeds are crossed in a rotational manner (each breed's males used in rotation with the crossbred females), it is called a 3-way rotational cross.
Types of Rotational Crosses
| System | No. of Breeds | Common Name |
|---|---|---|
| 2-way rotational cross | 2 | Criss-cross breeding |
| 3-way rotational cross | 3 | — |
Why Other Options Are Wrong
- Crisscross: 2-breed rotational cross, not 3-breed.
- Triple crossing: Not a standard term for rotational 3-breed cross.
- 3-way cross: This refers to a terminal cross where F₁ (AxB) is mated with Breed C — NOT a rotational system.
Differences: Rotational vs Terminal Crosses
| Type | Feature |
|---|---|
| Rotational cross | Breeds used alternately in rotation; retains breeding stock from crossbreds |
| Terminal cross (3-way) | All crossbred progeny are used for slaughter/production only |
📚 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.
