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National Open University Exam Past Question – BIO 301 October, 2013 Examination

NATIONAL OPEN UNIVERSITY OF NIGERIA BIO 301 GENETICS II

14/16, Ahmadu Bello Way, Victoria Island

 

SCHOOL OF SCIENCE AND TECHNOLOGY October, 2013 Examination

 

COURSE CODE:     BIO 301

 

COURSE TITLE:      GENETICS II TIME ALLOWED:   2 HOURS

INSTRUCTION: ANSWER ANY FOUR QUESTIONS

 

 

1ai. Define population cytogenetics.

  1. ii. Discuss the genetic significance of de bi. Mention the goals of population genetics.
  2. ii. Describe the different types of duplications, and list their effec

 

2ai.Enumerate the role of structural chromosomal aberrations in plant breeding

  1. ii. Describe the mode of occurrence of the different types of inversions you know. b. Polyploids are of significant effects, Discuss

 

3ai.How do genes determine sex?

  1. ii. Describe the structure of pr
  2. What are the components of a ribosome?
  3. ii. Describe the various stages involved in transc

 

4ai. What do you understand by the term pedigree?

  1. ii. Write short notes on the following:

(i) Karyotype (ii) Codominance (iii) dosage compensation.

  1. Explain why sickle cell anemia is regarded as a heritable disease.

 

5ai. What do you understand by the term paralogous?

  1. ii. Briefly discuss the origin of polyploidy. bi. List the characteristics of X-linked traits ii. Write short notes on the following:

(i)silent mutation (ii)missence mutation (iii)point mutation

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6ai. What do you understand by the term mutagens?

  1. ii. Describe the mode of action of the following mutagens: (i) Nitrous acid (ii) A base Analog (iii)UV light
  2. Define genetic transfer.
  3. ii. How can you tell if there are any mutant colonies in a culture?

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