DISTANCE EDUCATION
M.Sc. (Zoology) DEGREE EXAMINATION, MAY 2016.
DEVELOPMENTAL BIOLOGY
Time Three hours Maximum 100 marks
SECTION A — 8 40 marks)
Answer any FIVE questions.
All questions carry equal marks.
1. Write in brief on spermiogenesis.
2. Define the reaction of egg contacted with spermatozoa.
3. What are the factors influencing cleavage?
4. Define fate map.
5. Explain 'cell movement' and 'affinity'.
6. Write a short note on development of eye in an embryo.
7. Briefly explain the formation of notochord.
8. Define the concept of Assisted Reproductive Technology
(ART).
SECTION B — 15 60 marks)
Answer any FOUR questions.
All questions carry equal marks.
9. Discuss with suitable diagrams on different stages of
Oogenesis.
10. Write an essay on the egg recognition, gamete fusion and
prevention of polyspermy.
Sub. Code
22
DE-3935
WS
2
11. Explain blastula formation and their types.
12. Discuss about the process of gastrulation in frog.
13. Explain the types of placenta in mammals and their
roles.
14. Explain the nuclear transplantation and their
advantages.
15. Elaborately by discuss about the factors influencing
teratogenesis and its effect on the developmental process.