M.Sc. Qualifying Examination (Revised) GPB gkvk

Department of Genetics and Plant Breeding

College of Agriculture, UAS GKVK, Bengaluru – 560 065

M.Sc. Qualifying Examination (Revised)
Model Paper
Duration: 1 hour 15 minutes  Marks: 100

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I. Define / Explain Any Ten of the Following

(1 × 10 = 10 marks)

1. Dominant and Recessive Epistasis

2. Chromosomal Hypothesis

3. Synaptonemal Complex

4. Monosomics

5. Chromosome Segregation

6. Polyploidy

7. Aneuploidy

8. Average Effect of Gene

9. Transgressive Segregants

10. Define Heritability (Broad Sense and Narrow Sense)

11. Auto-polyploid and Allo-polyploid

12. Cytoplasmic Inheritance

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II. Differentiate / Reason Out / Explain the Following

(2 × 10 = 20 marks)

1. Germplasm Collection and Base Collection

2. Dominance Hypothesis and Over-dominance Hypothesis of Heterosis

3. Describe Cytoplasmic Inheritance

4. Polyploidy and Aneuploidy

5. Synaptonemal Complex and Crossing Over

6. Describe all Stages of Meiosis

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III. Answer in Brief (Any 10)

(3 × 10 = 30 marks)

1. Name the Theory of Sex Determination in Drosophila assuming chromosomal as well as genetic basis.

2. Explain the structure of ANOVA table used for combining ability in Line × Tester mating design.

3. Explain Epistasis and write examples for different types of gene interactions.

4. Define additive, dominance, and epistatic components of genotypic variation.

5. What are the various types of genetic variances? Explain.

6. Explain different types of heterosis.

7. Explain the different components of means of six basic generations when additive-dominance model is adequate.

8. Explain AMMI model of stability analysis.

9. Write about elements of plant breeder’s success with case study.

10. Genetic basis and implications of heterosis.

11. Explain marker-assisted backcross breeding for gene pyramiding with an example.

12. Write about commercial success and issues related to commercial release of GMO.