GPB 504 (1+1) Principles of Quantitative Genetics (Question Paper)

   

1. Define Dominance deviation. 1.00
2. Mention the criteria to define a stable genotype based on Eberhart and Russel (1966) model. 1.00
3. Interpret the significance and direction of 'F', the covariance of additive and dominance gene effects. 1.00
4. Mention the relationship between breeding value and combining ability. 1.00
5. Define average effect of a gene. 1.00
6. Define additive effect of a gene. 1.00
7. Differentiate between scaling and joint scaling tests of examining the adequacy of additive-dominance model. 2.00
8. Define joint-scaling tests to examine the adequacy of additive-dominance model to explain the inheritance of quantitative traits. 2.00
9. Explain the method of estimating variance purely attributable to non-genetic sources. 2.00
10. Write the structure of ANOVA for combining ability of Line × tester mating design. 2.00
11. Mention the parameters to assess stability/adaptability of genotypes. 2.00
12. Derive an expression for estimating population mean in terms of frequencies of alleles and their effects at a single locus. 3.00
13. Explain the method of estimating additive and dominance genetic variance using variances of basic generations: parents (P₁ & P₂), F₁ (P₁ × P₂), F₂ (P₁ × P₂), B₁ (F₁ × P₁), and B₂ (F₁ × P₂). 3.00
14. Explain the relative advantages and disadvantages of first degree statistics-based genetic analysis of quantitative traits. 3.00
15. Explain genetic architecture of quantitative traits based on the graphical analysis of data from the progeny obtained by diallel mating design. 5.00
16. Derive components of means — P₁, P₂, F₁, F₂, B₁, and B₂ generations assuming adequacy of additive-dominance model. 5.00
17. Derive the expression for relationship between population mean and gene frequency. 5.00