Advances in Genetics, Genomics and Plant Breeding — DU B.Sc. (Hons.) Botany Previous Year Question Papers

Only four questions are required to be attempted in all. Q.1. (a) Define the following (any five): (1X5=5) i. Introgression i. Aneuploidy ii. Self-incompatibility iv. Heterosis v. Gene tagging vi. Base editing vii. Apomixis (b) Expand (any five): (1X5=5) i. NGS ii. FISH 1i1. BSA iv. MAS v. gRNA vi. ChiP vii. PAM (c) State True/False for the given statements (any five): (1X5=5) (1) Heterochromatin is loosely packed and gene-rich. (ii) Alien gene transfer involves genes from closely related species only. (i) Aneuploidy involves change in entire sets of chromosomes. (iv) Wild germplasm may carry both beneficial and undesirable traits. (v) Metagenomics studies genomes of isolated pure cultures only. (vi) Self-incompatibility promotes cross-pollination. Q2. Differentiate between the following (any three): (5x3=15) (i) GISH and FISH Genomics and Epigenomics (ill) Heterosis and Inbreeding Depression (iv) Gene editing and Gene silencing (v) Pedigree analysis and Genetic counselling Q3. Write short notes on the following (any three): (5x3=15) (i) Plant breeders and Farmers' rights Applications of Genetically Modified Organisms Q4. (a) "Epigenetic variation provides an additional layer of heritable diversity." Discuss its (7) significance in plant breeding (b) How do chromosomal changes contribute to evolution as well as challenges in crop improvement? Discuss with examples. (8) Q5. (a) Discuss the ethical, legal and social implications of genetic analysis and research, particularly with reference to human welfare with suitable example. (b) What are primary, secondary and tertiary gene pools? Discuss how gene pools can be utilized to introduce novel traits into cultivated crops. (7) Q6. (a) What is complementation? Discuss the cis-trans complementation analysis with suitable example. (8)