NATIONAL OPEN UNIVERSITY OF NIGERIA

UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
APRIL/MAY 2019 EXAMINATION

Course code: BIO 301 Genetics    

Units: 2

Time allowed: 2 Hours

INSTRUCTION: Answer question ONE (1) and any other THREE (3) questions

1a.What is genetic drift? (2marks)

b. Why do we study populations and gene frequencies? (3marks)

c. List the two methods by which polyploidy can be induced. (2marks)

d. What are the characteristic features of haploid plants (5 marks)

e. Name 4 allopolyloid crops you know (4marks)

f. Name one acquired characteristic that may have both an inherited and environmental basis (1mark)

g. Name three basic mutagens known to you (3marks)

h. Enumerate the general steps involved in the lytic cycle (5marks)

2a.What is translation of genetic materials? (2marks)

b. Discuss the components of translation. (13marks)

3a. Name five examples of triploid crops you know. (5marks)

b. Write notes on collagen. (10marks)

4a. Define genetic polymorphism (2marks)

b. Discuss the muscular dystrophy (8marks)

c. Write short note on homologous (5marks)

5a.What are the three types of barriers that can cause habitat isolation (3marks)

b. How can you tell if there are mutant colonies in a culture? (2marks)

c. Discuss the characteristics of x-linked traits (10marks)