M.Sc. DEGREE EXAMINATION, APRIL 2017
Second Semester
Zoology
GENETICS
(2016 onwards)
Time 3 Hours Maximum 75 Marks
Section A (10 x 2 20)
Answer all questions.
All questions carry equal marks.
1. Test cross.
2. What is gynandromorph?
3. RAPD.
4. What is gene pyramiding?
5. Make a note on the types of mutation.
6. What is a junk gene?
7. One gene one enzyme hypothesis.
8. Symptoms of alkaptonuria.
9. What is gene frequency?
10. Define: Hardey-Weinberg Law.
Sub. Code
509202
RW-198
2
Wk 10
Section B x 5 25)
Answer all questions.
All questions carry equal marks.
11. Explain briefly the chromosomal means of sex
determination.
Or
Write an account on the law of segregation and its
consequences with the help of a suitable example.
12. Make a note on the following:
Polyploidy
Haploidy.
Or
What are molecular markers? Explain briefly its
importance in genetic differentiation.
13. Define mutation and explain various factors
inducing mutations.
Or
What is lac operon? Comment the mechanism of lac
operon model.
14. Write a short note on
Genetic polymorphism and
Neo Lamarckism.
Or
Explain briefly the theory of chemical evolution.
RW-198
3
Wk 10
15. How does RFLP helpful as a tool in nucleic acid
phylogenetic analysis?
Or
Write down the salient features of genetic drift.
Section C x 10 30)
Answer any three questions.
All questions carry equal marks.
16. Write an essay on the principles of Mendel and their
practical application in genetic inheritance.
17. Give a detailed account on chromosomal aberrations.
18. Write an essay on prokaryotic gene expression.
19. Describe the genetic theory of natural selection with a
note on genetic variations.
20. Discuss in detail about the use of molecular phylogenies
in taxonomic studies.
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