5 Written questions
5 Matching questions
- Genetic Variation
- Characteristics of Repeatability
- Accurate Measurement
- Independent Culling Levels
- a Set a minimum performance level for each trait being considered. Cull any animal that does not meet the standard for every trait.
- b -not fixed, varies across populations and environments
-used for making culling decisions
- c Reduce potential measurement error, use most precise measurement as possible.
- d Calculated using covariance, a measure of how two traits or values vary together in a population.
- 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
- Indicator of the expected change in one trait relative to change in another trait in a population.
- Training, permanent injury, developmental programming.
- performance potential for a repeated trait in an individual.
- Multiple trait selection reduces selection intensity compared to selection for a single trait.
- Ratio of individual performance compared to contemporary group mean.
5 True/False questions
Accuracy of Selection → Correlation between true BV and predicted breeding value for a trait in a population.
Repeated Traits → Traits for which individual animals have multiple performance records. (milk production, calf weaning weight)
Environmental Uniformity → Manage animals to keep environmental effects as similar as possible across the population.
Heritability → Measure of the strength of the relationship between P and BV for a trait in a population.
Contemporary Grouping → Calculated using covariance, a measure of how two traits or values vary together in a population.