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 307

COURSE TITLE:            EVOLUTION

TIME ALLOWED:         2 Hours

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

1. (a) Define genetic recombination.                                                                                                 (3 marks)

     (b) Write short notes on the following:

(i) deleterious alleles                                                                                                                                      (5 marks)

(ii) fate of mutant alleles (5 marks)

    (c) Analyze the concept of mutation as in molecular biology and genetics.                     (12 marks)

 2. With reference to evolutionary outcomes discuss the following:

(i) adaptation                                                                                                              (5 marks)

(ii) speciation                                                                                                              (5 marks)

(iii) hybrid gender                                                                                                       (5 marks)

 3. There are four fundamental processes governing population genetics, account for any three of them.

(15 marks)

 4. (a) Distinguish between prokaryotes and Eukaryotes.                                                      (7 marks)

     (b) Write short notes on allopatric speciation and peripatric speciation.                        (8 marks)

 5. (a) Outline the techniques that can be used to investigate polymorphism.                     (9 marks)

     (b) Briefly describe the mechanisms for balancing selection.                                          (6 marks)

 6. (a) Define mutation.                                                                                                          (3 marks)

     (b) Classify mutations by inheritance and special classes.                                               (12 marks)