GPB (608)CROP EVOLUTION (Question Paper )

 

  I. Define/Write about the following:

• Genetic Resource
• Nonsense Mutation
• Species
• Introgression
• Carbon dating
• Evolution
• Super domestication
• Syndrome
• Intra-specific hybridization
• Gene silencing

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II. Answer the following questions:

1. What is GP3? How is it different from GP1?
2. List the Vavilovian Centres of Origin.
3. How does one differentiate Centres of Diversity from Centres of Origin?
4. What is the Founder Effect? What are the ways by which new forms evolve in nature?
5. What are the changes expected during domestication? Discuss.
6. Discuss the positive and negative effects of domestication, using cats as an example.
7. What is unconscious selection? Discuss its role in the evolution of new forms.
8. How do genes get transferred in nature? List the techniques used to increase gene flow in crop plants.
9. What are super weeds? How do they arise naturally or artificially? Will they affect the environment? Discuss.
10. Discuss the evolution of wheat.

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III. Answer the following questions:

1. What are the evidences available to support the evolution of maize from teosinte?
2. Discuss the process of evolution in the Brassica group. What evidences support this process?
3. What are the techniques used to confirm transgene integration? How is a transgene fixed in a population?