Genetic models
27 important questions on Genetic models
What is a genetic model?
Where are genetic models used for?
Where do genetic models give insight in?
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What important phases indicate changes in environmental influeces?
- From birth to weaning
- From weaning to reproductive matuirity
- Maturity and the rest of the animal's life
What is a polygenic trait?
What is the infinitesimal model?
What means that the covariance between G and E is assumed to be 0
How is variation is a population expressed?
What types of undelying effect does the genetic component consists of?
- The dominance effects: interaction between alleles of the same gene
- Additive genetic effects of breeding values: all that is left after correcting for the interactive effects
Why are dominance and epistasis often ignores?
What is the mendelian sampling term?
How can you write the breeding value of an offspring in model terms?
How do you estimate the variance components of A?
What is the heritability? (h2)
Why is a hertability always estimated for a specific population in a specific environment?
- it reflects the genetic variation for a trait in that specific population
- it is relative to the phenotypic variation for the trait in that specific population
What is an easy whay to get an impression of the size of the heratability?
What is a common environment?
How can the common environmental effect be incorperated in the genetic model?
Why would you be interested in the common environmental variance?
How do you write the phenotypic variance taking into account the comon environmental effect?
What is the common environmental factor?
What does a biased heritability mean?
What is the maternal effect?
What is the indirect of social effect?
How can the inderect/social effect be modeled?
Ad= direct genetic effect of the animal itself
As= the social genetic effects of group members
Ed= the direct environment effect of the animal itsel
Es= the social environmental effects of group members
What are repeated observations?
What is the permanent environmental effect?
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