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5 Written questions

5 Matching questions

  1. Regression
  2. Producing Ability
  3. Characteristics of Heritability
  4. Selection Index
  5. Trait Ratios
  1. a Indicator of the expected change in one trait relative to change in another trait in a population.
  2. b -influences resemblance among relatives
    -influences accuracy of selection and rate of genetic change
  3. c Calculate a combined "breeding value" based on several traits.
  4. d Ratio of individual performance compared to contemporary group mean.
  5. e performance potential for a repeated trait in an individual.

5 Multiple choice questions

  1. Selection based on performance above a certain level.
  2. Set a minimum performance level for each trait being considered. Cull any animal that does not meet the standard for every trait.
  3. Rate at which selected individuals replace existing parents in the population.
  4. Time required to replace on generation with the next generation. Shorter interval = faster rate of genetic change.
  5. Correlation between true BV and predicted breeding value for a trait in a population.

5 True/False questions

  1. Rate of Genetic ChangeImportant for individual performance


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


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


  4. Genetic VariationVariability of BV for a trait in the population. The greater the genetic variation, the greater the difference between superior and inferior animals.


  5. Permanent Environmental EffectNutrition, track conditions, illnesses