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5 Written Questions

5 Matching Questions

  1. Independent Culling Levels
  2. Environmental Uniformity
  3. Repeated Traits
  4. Temporary Environmental Effect
  5. Truncation Selection
  1. a Manage animals to keep environmental effects as similar as possible across the population.
  2. b Nutrition, track conditions, illnesses
  3. c Set a minimum performance level for each trait being considered. Cull any animal that does not meet the standard for every trait.
  4. d Traits for which individual animals have multiple performance records. (milk production, calf weaning weight)
  5. e Selection based on performance above a certain level.

5 Multiple Choice Questions

  1. -not fixed, varies across populations and environments
    -used for making culling decisions
  2. Correlation between true BV and predicted breeding value for a trait in a population.
  3. Genetic value as a parent. Indication of potential to contribute to offspring.
  4. -influences resemblance among relatives
    -influences accuracy of selection and rate of genetic change
  5. Strictness of selection criteria.

5 True/False Questions

  1. Sire SummariesRatio of individual performance compared to contemporary group mean.

          

  2. Contemporary GroupingGrouping animals that experience similar environmental effects.

          

  3. Replacement RateTraits for which individual animals have multiple performance records. (milk production, calf weaning weight)

          

  4. Selection IntensityCalculate a combined "breeding value" based on several traits.

          

  5. Selection IndexCalculate a combined "breeding value" based on several traits.

          

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