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5 Written questions

5 Matching questions

  1. Genetic Variation
  2. Characteristics of Repeatability
  3. Accurate Measurement
  4. Correlation
  5. Independent Culling Levels
  1. a Set a minimum performance level for each trait being considered. Cull any animal that does not meet the standard for every trait.
  2. b -not fixed, varies across populations and environments
    -used for making culling decisions
  3. c Reduce potential measurement error, use most precise measurement as possible.
  4. d Calculated using covariance, a measure of how two traits or values vary together in a population.
  5. e Variability of BV for a trait in the population. The greater the genetic variation, the greater the difference between superior and inferior animals.

5 Multiple choice questions

  1. Indicator of the expected change in one trait relative to change in another trait in a population.
  2. Training, permanent injury, developmental programming.
  3. performance potential for a repeated trait in an individual.
  4. Multiple trait selection reduces selection intensity compared to selection for a single trait.
  5. Ratio of individual performance compared to contemporary group mean.

5 True/False questions

  1. Accuracy of SelectionCorrelation between true BV and predicted breeding value for a trait in a population.


  2. Repeated TraitsTraits for which individual animals have multiple performance records. (milk production, calf weaning weight)


  3. Environmental UniformityManage animals to keep environmental effects as similar as possible across the population.


  4. HeritabilityMeasure of the strength of the relationship between P and BV for a trait in a population.


  5. Contemporary GroupingCalculated using covariance, a measure of how two traits or values vary together in a population.