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

Department of Genetics and Plant Breeding

University of Agricultural Sciences, GKVK, Bangalore – 560 065

Model Question Paper for Qualifying Examination of Senior M.Sc. Students
I Semester – 2011–12
Duration: 3 Hours  Maximum Marks: 100

I. Define (Any 10 out of 12)

(One mark each)

  1. Average effect

  2. Pure line

  3. Dominance

  4. Primosome

  5. Euploid

  6. Vybirds

  7. Heterobeltiosis

  8. Transgressive segregation

  9. Epigenetics

  10. Secondary polyploid

  11. Gene duplication

  12. Secondary gene pool

II. Answer the Following (Any 10 out of 12)

(Two marks each)

  1. Different types of tRNA

  2. Additive variance vs. Dominant variance

  3. Differentiate organogenesis and somatic embryogenesis

  4. Define selection index for a quantitative trait

  5. What are the different types of repeat sequences in DNA recombination?

  6. Define multiple alleles with an example

  7. Differentiate RNA editing and RNA splicing

  8. Write the roles of topoisomerase and helicase in DNA replication

  9. What are the different components of plant resistance to insects?

  10. Linkage equilibrium

  11. Differentiate synapsis vs. asynapsis

  12. Explain the role of synaptonemal complex formation in chromosomal recombination

III. Write Short Notes on the Following (Any 10 out of 12)

(Three marks each)

  1. Explain the gene-to-gene concept related to host–plant resistance.

  2. Draw a schematic diagram showing the introgression of a recessive gene into an elite cultivar.

  3. Write the features of the genetic code.

  4. List out the differences between A-DNA, B-DNA, and Z-DNA.

  5. What are the different types of DNA markers? Classify them as dominant and co-dominant markers.

  6. List out the important differences between prokaryotic and eukaryotic translation.

  7. Define covariance for a quantitative trait.

IV. Answer the Following (8 out of 12)

(Five marks each)

  1. Write an essay on chromosomal recombination during meiosis I.

  2. Give an account of the role of aneuploidy in crop improvement.

  3. Elucidate the bidirectional mode of DNA replication with suitable diagrams.

  4. What is an operon concept? Explain the steps involved in gene expression by induction and repression.

  5. What is pedigree method of selection? Explain the steps involved in the pedigree method.

  6. Differentiate male sterility and self-incompatibility. Describe the different systems of self-incompatibility.

  7. Discuss the steps involved in the development of a transgenic plant and its exploitation in crop breeding.

  8. Explain the ways and means of material transfer happening through the membrane systems of a eukaryotic cell.

  9. What is apoptosis? Explain the different steps involved in apoptosis and its significance.

  10. Write in detail the process of protein synthesis from mRNA.

  11. What is karyotyping? Discuss chromosome banding techniques and their applications.

  12. What is QTL mapping? Explain the successful exploitation of QTL mapping with reference to improvement of abiotic stress tolerance in rice.

V. Write Short Notes on the Following

(Two marks each)

  1. Write on the importance of stability of genotypes and list various stability models employed in varietal evaluation.

  2. Gene pyramiding.

  3. Steps of polymerase chain reaction (PCR) employed in DNA amplification.

  4. Steps involved in development of recombinant inbred lines (RILs).

  5. Vector-mediated gene transfer.


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