Model Paper-I (2011)

B.Sc.-I

Developmental Biology

Short answer questions:

1. Explain formation of acrosom.

2. What is cortical reaction?

3. Give an account of activation of egg during fertilization.

4. Give the events of penetration of sperm into the ovum.

5. Describe fertilizing-antifertilizin reaction.

6. What is parthenogenesis?

7. What are patterns of cleavage? Give their types.

8. What is amphimixis?

9. What are fate maps?

10. What is competence?

11. Give different types of regeneration.

12. Describe adult stem cell plasticity.

13. What is xenotransplantation?

14. What is embryo transfer technique?

15. Write principles of teratology.

Long answer questions:

1. What is gamete? Discuss in brief the process of spermatogenesis.

2. What are following and how are these formed?

(i) Fertilization membrane (ii) Penetration path

(iii) Fertilization cone (iv) Female pronuleus

3. What is acrosom? Discuss the events of the acrosom formation.

4. Define fertilization. Describe different phases of fertilization.

5. What is parthenogenesis? Discuss.

6. What is blastula? Give different types of blastulation.

7. What do you understand by differentiation? Describe different levels of differentiation.

8. What do you understand by gastrulation? Describe the process of emboly in detail.

9. Describe a detailed mechanism of regeneration in animals with suitable diagrams.

10. Describe 48hrs developmental stage of chick with suitable diagram.

11. What is placenta? Describe the process of formation of chorio-allantoic placenta.

12. Give an account of various types of stem cells.

13. What is cloning? Describe in detail the nuclear transfer technique.

14. Discuss various source, distribution and effect of xenobiotics.

15. Give an account of cellular and extra cellular changes taking place during ageing.