LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

M.Sc. DEGREE EXAMINATION – ZOOLOGY

TS 28

SECOND SEMESTER – APRIL 2007

ZO 2801 – GENETICS

 

 

 

Date & Time: 19/04/2007 / 1:00 – 4:00          Dept. No.                                                             Max. : 100 Marks

 

 

 

Part A                                                (Answer all)                                    10 X 2 = 20

 

1. Comment on base analogues.
2. Explain somatic luxuriance.
3. Differentiate transformation and transduction.
4. Categorise substitution mutations.
5. Comment on epistasis.
6. What are multiple alleles?
7. Comment on amniocentesis.
8. What are interferons?
9. Distinguish monoploidy from haploidy
10. Explain nucleolar organizer.

 

Part B                                                 (Answer any four)                             4 X 10 = 40

 

1. Explain the semiconservative type of DNA replication
2. Give an account of bacterial conjugation.
3. Write notes on inherited disorders in man
4. Elucidate the importance of prenatal diagnosis
5. Explain the role of genes in development
6. Write notes on restriction enzymes.

 

Part C                                                (Answer any two)                          2 X 20 = 40

17. Describe lac operon.
18. Categorise the transcripts and elaborate their role in biosynthesis of proteins.
19. DNA is the genetic material. Substantiate.
20. Describe linkage and crossing over.

 

 

 

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