LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034          B.Sc. DEGREE EXAMINATION – ZOOLOGY

AF 10

FIFTH SEMESTER – NOV 2006

         ZO 5501 – GENETICS

(Also equivalent to ZOO 510)

 

 

Date & Time : 27-10-2006/9.00-12.00   Dept. No.                                                       Max. : 100 Marks

 

 

Part-A

Answer ALL.                                                                                                                   (10×2=20 marks)

 

1. What is non-disjunction?
2. Define the following.
3. Muton b. Allele
4. What is a Syndrome?
5. Find the result of the following crosses.
6. AB x AB b. OO x AA
7. Find out the gene frequency of A and a. Where the genotype frequency of ‘a’ is 0.25.
8. What is antigen antibody reaction?
9. What are transduction and transformation?
10. When a carrier woman is married to a colorblind man whose mother is normal, what is the

possibility of colorblindedness in their progeny.

9. What is law of segregation?
10. Distinguish co-dominance and incomplete dominance.

Part-B

Answer any FOUR.                                                                                               (5×8=40 marks)

 

11. Explain in detail the chromosomal aberrations.
12. Explain with suitable example y-linked inheritance.
13. With suitable example explain crossing over.
14. Write a paragraph on mendel’s dihybrid cross.
15. Explain the factors affecting Hardy Weinberg’s law.
16. Write a paragraph on the principles of bio-informatics.

 

Part-C

Answer any TWO.                                                                                               (2×20=40 marks)

 

17. a. What is maternal inheritance?
18. Write an essay on cytoplasmic inheritance.
19. a. What is a phage?
20. Write an experiment to prove DNA as the genetic material through phage infection.
21. a. Define multiple alleles.
22. With suitable examples explain multiple allelism.
23. Write an essay on the human genome project.

 

 

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