5 Written Questions
5 Matching Questions
- Independent Culling Levels
- Environmental Uniformity
- Repeated Traits
- Temporary Environmental Effect
- Truncation Selection
- a Manage animals to keep environmental effects as similar as possible across the population.
- b Nutrition, track conditions, illnesses
- c Set a minimum performance level for each trait being considered. Cull any animal that does not meet the standard for every trait.
- d Traits for which individual animals have multiple performance records. (milk production, calf weaning weight)
- e Selection based on performance above a certain level.
5 Multiple Choice Questions
- -not fixed, varies across populations and environments
-used for making culling decisions
- Correlation between true BV and predicted breeding value for a trait in a population.
- Genetic value as a parent. Indication of potential to contribute to offspring.
- -influences resemblance among relatives
-influences accuracy of selection and rate of genetic change
- Strictness of selection criteria.
5 True/False Questions
Sire Summaries → Ratio of individual performance compared to contemporary group mean.
Contemporary Grouping → Grouping animals that experience similar environmental effects.
Replacement Rate → Traits for which individual animals have multiple performance records. (milk production, calf weaning weight)
Selection Intensity → Calculate a combined "breeding value" based on several traits.
Selection Index → Calculate a combined "breeding value" based on several traits.