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Zool 310: Developmental Biology Question Paper

Zool 310: Developmental Biology

Course:Bachelor Of Education Science

Institution: Kabarak University question papers

Exam Year:2010

COURSE TITLE: DEVELOPMENTAL BIOLOGY
STREAM: SESSION V & VI

INSTRUCTIONS:
Answer All the questions in SECTION (A) and any two (2) questions in SECTION (B)

SECTION A (40 MARKS)
1. a) Define the following terms:
i. Microlecithal
ii. Mesolecithal
iii. Macrolecithal
iv. Oligolecithal
v. Telolecithal (5 marks)
b) What is zona pallicida (1 mark)

2. a) If spermatogenesis is normal and all cells survive, how many sperms will result from
i. 50 primary spermatocytes (1 mark)
ii. 50 spermatids (1 mark)
b) How does meisosis differ from mitosis? Consider differences in mechanism as well as
end results (4 marks)
3. In each somatic cell of a particular animal species there are 46 chromosomes. How many
should there be in
(a) Mature egg.
(b) First polar body
(c) Sperm
(d) Spermatid
(e) Primary spermatocyte
(f) Brain cell
(g) Secondary Oocyte
(h) Spermatogonia (8 marks)

4. In diagram form, outline the process of
a) Spermatogenesis (6 marks)
b) Oogenesis (6 marks)
5. Explain what is meant by Gastrulation. (8 marks)

SECTION B (30 MARKS)
6. Discuss molting and growth of the epidermis in a named arthropod. (15 marks)
7. Describe with the aid of well labelled diagrams, the structure and functions of the birds
membranes (15 marks)
8. Discuss the various ways in tissues growth. (15 marks)

Zool 310: Developmental Biology Question Paper

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