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5 Written questions

5 Matching questions

  1. Regression
  2. Replacement Rate
  3. Repeated Traits
  4. Producing Ability
  5. Truncation Selection
  1. a Traits for which individual animals have multiple performance records. (milk production, calf weaning weight)
  2. b Rate at which selected individuals replace existing parents in the population.
  3. c Indicator of the expected change in one trait relative to change in another trait in a population.
  4. d Selection based on performance above a certain level.
  5. e performance potential for a repeated trait in an individual.

5 Multiple choice questions

  1. Reduce potential measurement error, use most precise measurement as possible.
  2. Multiple trait selection reduces selection intensity compared to selection for a single trait.
  3. Lists of genetic predictions, accuracy values, and other information for sires within a breed.
  4. Grouping animals that experience similar environmental effects.
  5. Variability of BV for a trait in the population. The greater the genetic variation, the greater the difference between superior and inferior animals.

5 True/False questions

  1. Trait RatiosRatio of individual performance compared to contemporary group mean.


  2. CorrelationCalculated using covariance, a measure of how two traits or values vary together in a population.


  3. Temporary Environmental EffectNutrition, track conditions, illnesses


  4. Tandem SelectionSelect for one trait at a time. After reaching the target for the first trait begin selecting for the next trait.


  5. Generation IntervalCalculate a combined "breeding value" based on several traits.


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