Question:
Animals are selected for breeding on the basis of all of the following characteristics, except
Animals are selected for breeding on the basis of all of the following characteristics, except
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Breeding selection always focuses on functional economic traits: milk yield, feed conversion ratio (yield to diet), udder conformation, and disease resistance.
Non-functional physical traits like ear length are not used as selection criteria.
Non-functional physical traits like ear length are not used as selection criteria.
Updated On: Jul 24, 2026
- Mammary system and udder
- Ratio of yield to diet
- Having long ears
- Disease resistance
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The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept:
Selection is the process of choosing specific animals from a herd to be the parents of the next generation, aimed at improving heritable production and health traits over time.
Step 2: Detailed Explanation:
The selection of animals for a breeding program is based on traits of economic importance, which are classified into production, conformation, and health traits:
- Mammary system and udder (Option A): This is a critical conformation trait in dairy animals.
Good udder depth, teat placement, and strong suspensory ligaments are directly associated with high milk yield, ease of milking, and resistance to mastitis.
- Ratio of yield to diet (Option B): This represents feed conversion efficiency.
Animals that produce more milk or meat per unit of feed consumed are highly desirable as they reduce feeding costs and increase profitability.
- Disease resistance (Option D): Selecting animals with high resistance to endemic diseases (like mastitis, tick-borne diseases, or foot-and-mouth disease) improves herd longevity and reduces veterinary expenses.
- Having long ears (Option C): Although long ears are a breed-specific physical characteristic for certain breeds (e.g., Gir cattle or Jamunapari goats), they are a non-functional aesthetic trait with no economic correlation to milk production, feed efficiency, or health.
Therefore, having long ears is not a characteristic used for selecting animals in breeding programs.
Step 3: Final Answer:
Animals are selected for breeding on the basis of all characteristics except having long ears.
Selection is the process of choosing specific animals from a herd to be the parents of the next generation, aimed at improving heritable production and health traits over time.
Step 2: Detailed Explanation:
The selection of animals for a breeding program is based on traits of economic importance, which are classified into production, conformation, and health traits:
- Mammary system and udder (Option A): This is a critical conformation trait in dairy animals.
Good udder depth, teat placement, and strong suspensory ligaments are directly associated with high milk yield, ease of milking, and resistance to mastitis.
- Ratio of yield to diet (Option B): This represents feed conversion efficiency.
Animals that produce more milk or meat per unit of feed consumed are highly desirable as they reduce feeding costs and increase profitability.
- Disease resistance (Option D): Selecting animals with high resistance to endemic diseases (like mastitis, tick-borne diseases, or foot-and-mouth disease) improves herd longevity and reduces veterinary expenses.
- Having long ears (Option C): Although long ears are a breed-specific physical characteristic for certain breeds (e.g., Gir cattle or Jamunapari goats), they are a non-functional aesthetic trait with no economic correlation to milk production, feed efficiency, or health.
Therefore, having long ears is not a characteristic used for selecting animals in breeding programs.
Step 3: Final Answer:
Animals are selected for breeding on the basis of all characteristics except having long ears.
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