NATIONAL OPEN UNIVERSITY OF NIGERIA

UNIVERSITY VILLAGE, PLOT 91, CASDASTRAL ZONE, NNAMDI AZIKIWE EXPRESS WAY, JABI, ABUJA.
FACULTY OF SCIENCES
OCTOBER/NOVEMBER 2014 EXAMINATION

COURSE CODE:           BIO 309

COURSE TITLE:            PLANT BREEDING

INSTRUCTION:            ANSWER ANY FOUR QUESTIONS IN 2 HOURS

Question One

a) Describe plant breeding and afford reasons why it is very relevant to man.

b) Differentiate between traditional and modern breeding

c) List at least 3 modern plant breeding

 Question Two

 a) List six major activities involved in plant breeding

 b) Describe the concept of participatory breeding

c) State briefly the issues of concern in participatory breeding

 Question Three

 a) Describe any 3 attributes of the chromosomes that justify it as the most studied and understood of all cell organ

 b) List the special types of chromosomes

 c) Write a short descriptive note on allosomes

Question Four

 a) Describe Hetrosis and explain its genetic basis

 b) What are the effects of hetorosis on animals?

 c) List the closest forms of inbreeding

Question Five

 a) What are the practical uses of F in plant breeding?

 b) Describe self incompatibility and explain its mechanism

 c) List any five types of self incompatibility

Question Six

Write a short note on any 3 of the following

 a) Inbreeding depression

 b) Epistasis

c) Over dominance   

d) Coefficient of breeding