DISTANCE EDUCATION
M.Sc. (Zoology) DEGREE EXAMINATION, MAY 2017.
DEVELOPMENTAL BIOLOGY
Time Three hours Maximum 100 marks
SECTION A — × 8 40 marks)
Answer any FIVE questions.
All questions carry equal marks.
1. Draw a neat sketch of sperm and describe in detail.
2. What are the different types of eggs?
3. How polyspermy is prevented? Explain.
4. Write a note on morphogenesis in frog.
5. Explain the germ cell determination and its migration.
6. Describe the process of cellular basis of morphogenesis.
7. Explain the formation of muscle in the process of
development.
8. What are the genetic defects reported during
development? Discuss.
Sub. Code
22
DE-757
2
Ws3
SECTION B — × 15 60 marks)
Answer any FOUR questions.
All questions carry equal marks.
9. Discuss elaborately an acrosomal reaction and
penetration of sperm.
10. Write an essay on the patterns of cleavage with neat
diagrams.
11. Explain the morphogenetic movements.
12. Gastrulation in chick. Write a detailed note with
diagram.
13. Describe the concept of organizer and embryonic
induction.
14. What is the role of cell death in development? How genes
are knocked and
15. Describe the process of Cell differentiation.