DISTANCE EDUCATION
M.Sc. (Zoology) DEGREE EXAMINATION, DECEMBER 2017.
GENETICS AND EVOLUTION
Time Three hours Maximum 100 marks
PART A — × 8 40 marks)
Answer any FIVE of the following in about 300 words each.
1. Explain about inborn error of metabolism and its
significance.
2. Enumerate the characteristics of multiple allelism with
example.
3. What is heterochromatin? Briefly explain its functions.
4. What is suppressor mutation? Make a note on its action.
5. Distinguish cistron, muton, recon and cis-trans
complementation.
6. Explain the role of isolation in organic evolution.
7. Emphasize the importance of species concept in the
evolution at population level.
8. What is clustal analysis? Make a note on the packages
available to determine the relationships among the
species based on clustal analysis.
Sub. Code
13
DE-3055
2
Ws 5
PART B — × 15 60 marks)
Answer any FOUR of the following in about 500 words each.
9. Describe the role of multiple allelism with a note on its
inheritance.
10. What is aneuploidy? Explain the numerical changes in
chromosomes during aneuploidy.
11. Explain the following terms and its significance with
example
Monosomy
Univalent shift
Nullisomy
Trisomy.
12. Discuss the modes of gradual speciation with their
significance.
13. How does sequential expression of genes contributed to
Drosophila eye colour and zebra fish patterns?
14. What is Neo-Lamarckism? Describe in detail the concept
of Neo-Lamarckism.
15. Write an essay on various tools involved in assessment of
molecular variation.
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