JNTU II B.Tech I Semester Regular Examinations, November 2008

JNTU II B.Tech I Semester Regular Examinations, November 2008

GENETICS

(Bio-Technology)

SET-3

 

 

1. Write short notes on the following:

(a) dihybrid ratio

(b) tri-hybrid ratio.

 

2. Describe the importance of active and inactive chromatin in the light of expression of genetic information.

 

3. Describe Bateson and Punnet’s coupling and Repulsion hypothesis.

 

4. How a genetic map is constructed in S.cervisiae? Emphasize on the tetrad analysis in the gene mapping.

 

5. Describe any 4 syndromes caused due to the abnormality in chromosome number.

 

 

6. What is the F factor and Hfr in bacteria? What is role played by them during sexual conjugation?

 

7. What is Y – linked dominant inheritance? Give an example correlating it with the expressivity?

 

8. Explain:

(a) Homoplasmy

(b) Heteroplasmy.

(c) Leber Optic Atropy

(d) MERRF & MECAS

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