Model Question Paper for M.Sc. (Agri.) Qualifying Examination GPB GKVK

Department of Genetics and Plant Breeding

Agriculture College, UAS GKVK

Model Question Paper for M.Sc. (Agri.) Qualifying Examination
Duration: 3 Hours  Maximum Marks: 100

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I. Define / Answer in Brief (Any 10)

(1 × 10 = 10 marks)

1. Polyploidy

2. Aneuploidy

3. Pseudo-dominance

4. Chromatin markers

5. Dominant hypothesis of heterosis

6. Over-dominance hypothesis of heterosis

7. Maternal effect

8. Incomplete dominance

9. Linkage

10. Recombination

11. Inversion

12. Mutation

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II. Substantiate the following (Any 10)

(2 × 10 = 20 marks)

1. Ribosomal RNA plays an important role in protein synthesis.

2. Selection in M₁ is not feasible.

3. Prebreeding is important in crop improvement.

4. Inbreeding increases homozygosity and decreases heterozygosity.

5. Explain how the Hardy–Weinberg principle serves as the basis for improvement of self-pollinated crops.

6. Selection helps in creating new variation and acts on heritable variation.

7. Hybrid vigour is heritable and commercially feasible in crop improvement.

8. Inversions are called as cross-over suppressors.

9. Mutations are sources of variability.

10. Role of quantitative genetics in crop improvement.

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III. Write Short Notes on the Following (Any 10)

(3 × 10 = 30 marks)

1. Biochemical and physiological basis of heterosis

2. Quantitative traits

3. Advantages and disadvantages of first-degree statistics-based genetic analysis of quantitative traits

4. Sex-linked, sex-limited and sex-influenced traits

5. Maternal effect and maternal inheritance

6. Aneuploidy and polyploidy in crop improvement

7. Multiple factor hypothesis

8. Diallel mating design

9. Triple test cross

10. Role of vectors in cloning

11. Synthetics and composites

12. Gene interaction